diff --git a/amplitude.js b/amplitude.js
index 83f92cf0..dd3e17a2 100644
--- a/amplitude.js
+++ b/amplitude.js
@@ -430,7 +430,7 @@ Amplitude.prototype._logEvent = function(eventType, eventProperties, apiProperti
     object.merge(userProperties, this._utmProperties);
 
     // Add referral info onto the user properties
-    if (this.options.includeReferrer && this._getReferrer()) {
+    if (this.options.includeReferrer) {
       object.merge(userProperties, {
         'referrer': this._getReferrer(),
         'referring_domain': this._getReferringDomain()
diff --git a/amplitude.min.js b/amplitude.min.js
index 23b563a0..7dc65ba0 100644
--- a/amplitude.min.js
+++ b/amplitude.min.js
@@ -1,2 +1,2 @@
-(function umd(require){if("object"==typeof exports){module.exports=require("1")}else if("function"==typeof define&&define.amd){define(function(){return require("1")})}else{this["amplitude"]=require("1")}})(function outer(modules,cache,entries){var global=function(){return this}();function require(name,jumped){if(cache[name])return cache[name].exports;if(modules[name])return call(name,require);throw new Error('cannot find module "'+name+'"')}function call(id,require){var m=cache[id]={exports:{}};var mod=modules[id];var name=mod[2];var fn=mod[0];fn.call(m.exports,function(req){var dep=modules[id][1][req];return require(dep?dep:req)},m,m.exports,outer,modules,cache,entries);if(name)cache[name]=cache[id];return cache[id].exports}for(var id in entries){if(entries[id]){global[entries[id]]=require(id)}else{require(id)}}require.duo=true;require.cache=cache;require.modules=modules;return require}({1:[function(require,module,exports){var Amplitude=require("./amplitude");var old=window.amplitude||{};var q=old._q||[];var instance=new Amplitude;for(var i=0;i<q.length;i++){var fn=instance[q[i][0]];fn&&fn.apply(instance,q[i].slice(1))}module.exports=instance},{"./amplitude":2}],2:[function(require,module,exports){var Cookie=require("./cookie");var JSON=require("json");var language=require("./language");var localStorage=require("./localstorage");var md5=require("JavaScript-MD5");var object=require("object");var Request=require("./xhr");var UAParser=require("ua-parser-js");var UUID=require("./uuid");var version=require("./version");var log=function(s){console.log("[Amplitude] "+s)};var API_VERSION=2;var DEFAULT_OPTIONS={apiEndpoint:"api.amplitude.com",cookieExpiration:365*10,cookieName:"amplitude_id",domain:undefined,includeUtm:false,language:language.language,optOut:false,platform:"Web",savedMaxCount:1e3,saveEvents:true,sessionTimeout:30*60*1e3,unsentKey:"amplitude_unsent",uploadBatchSize:100};var LocalStorageKeys={LAST_EVENT_ID:"amplitude_lastEventId",LAST_EVENT_TIME:"amplitude_lastEventTime",SESSION_ID:"amplitude_sessionId"};var Amplitude=function(){this._unsentEvents=[];this._ua=new UAParser(navigator.userAgent).getResult();this.options=object.merge({},DEFAULT_OPTIONS)};Amplitude.prototype._eventId=0;Amplitude.prototype._sending=false;Amplitude.prototype._lastEventTime=null;Amplitude.prototype._sessionId=null;Amplitude.prototype._newSession=false;Amplitude.prototype.init=function(apiKey,opt_userId,opt_config){try{this.options.apiKey=apiKey;if(opt_config){if(opt_config.saveEvents!==undefined){this.options.saveEvents=!!opt_config.saveEvents}if(opt_config.domain!==undefined){this.options.domain=opt_config.domain}if(opt_config.includeUtm!==undefined){this.options.includeUtm=!!opt_config.includeUtm}if(opt_config.includeReferrer!==undefined){this.options.includeReferrer=!!opt_config.includeReferrer}this.options.platform=opt_config.platform||this.options.platform;this.options.language=opt_config.language||this.options.language;this.options.sessionTimeout=opt_config.sessionTimeout||this.options.sessionTimeout;this.options.uploadBatchSize=opt_config.uploadBatchSize||this.options.uploadBatchSize;this.options.savedMaxCount=opt_config.savedMaxCount||this.options.savedMaxCount}Cookie.options({expirationDays:this.options.cookieExpiration,domain:this.options.domain});this.options.domain=Cookie.options().domain;_loadCookieData(this);this.options.deviceId=opt_config&&opt_config.deviceId!==undefined&&opt_config.deviceId!==null&&opt_config.deviceId||this.options.deviceId||UUID();this.options.userId=opt_userId!==undefined&&opt_userId!==null&&opt_userId||this.options.userId||null;_saveCookieData(this);if(this.options.saveEvents){var savedUnsentEventsString=localStorage.getItem(this.options.unsentKey);if(savedUnsentEventsString){try{this._unsentEvents=JSON.parse(savedUnsentEventsString)}catch(e){}}}if(this._unsentEvents.length>0){this.sendEvents()}if(this.options.includeUtm){this._initUtmData()}this._lastEventTime=parseInt(localStorage.getItem(LocalStorageKeys.LAST_EVENT_TIME))||null;this._sessionId=parseInt(localStorage.getItem(LocalStorageKeys.SESSION_ID))||null;this._eventId=localStorage.getItem(LocalStorageKeys.LAST_EVENT_ID)||0;var now=(new Date).getTime();if(!this._sessionId||!this._lastEventTime||now-this._lastEventTime>this.options.sessionTimeout){this._newSession=true;this._sessionId=now;localStorage.setItem(LocalStorageKeys.SESSION_ID,this._sessionId)}this._lastEventTime=now;localStorage.setItem(LocalStorageKeys.LAST_EVENT_TIME,this._lastEventTime)}catch(e){log(e)}};Amplitude.prototype.isNewSession=function(){return this._newSession};Amplitude.prototype.nextEventId=function(){this._eventId++;return this._eventId};var _loadCookieData=function(scope){var cookieData=Cookie.get(scope.options.cookieName);if(cookieData){if(cookieData.deviceId){scope.options.deviceId=cookieData.deviceId}if(cookieData.userId){scope.options.userId=cookieData.userId}if(cookieData.globalUserProperties){scope.options.userProperties=cookieData.globalUserProperties}if(cookieData.optOut!==undefined){scope.options.optOut=cookieData.optOut}}};var _saveCookieData=function(scope){Cookie.set(scope.options.cookieName,{deviceId:scope.options.deviceId,userId:scope.options.userId,globalUserProperties:scope.options.userProperties,optOut:scope.options.optOut})};Amplitude._getUtmParam=function(name,query){name=name.replace(/[\[]/,"\\[").replace(/[\]]/,"\\]");var regex=new RegExp("[\\?&]"+name+"=([^&#]*)");var results=regex.exec(query);return results===null?undefined:decodeURIComponent(results[1].replace(/\+/g," "))};Amplitude._getUtmData=function(rawCookie,query){var cookie=rawCookie?"?"+rawCookie.split(".").slice(-1)[0].replace(/\|/g,"&"):"";var fetchParam=function(queryName,query,cookieName,cookie){return Amplitude._getUtmParam(queryName,query)||Amplitude._getUtmParam(cookieName,cookie)};return{utm_source:fetchParam("utm_source",query,"utmcsr",cookie),utm_medium:fetchParam("utm_medium",query,"utmcmd",cookie),utm_campaign:fetchParam("utm_campaign",query,"utmccn",cookie),utm_term:fetchParam("utm_term",query,"utmctr",cookie),utm_content:fetchParam("utm_content",query,"utmcct",cookie)}};Amplitude.prototype._initUtmData=function(queryParams,cookieParams){queryParams=queryParams||location.search;cookieParams=cookieParams||Cookie.get("__utmz");this._utmProperties=Amplitude._getUtmData(cookieParams,queryParams)};Amplitude.prototype._getReferrer=function(){return document.referrer};Amplitude.prototype._getReferringDomain=function(){var parts=this._getReferrer().split("/");if(parts.length>=3){return parts[2]}return""};Amplitude.prototype.saveEvents=function(){try{localStorage.setItem(this.options.unsentKey,JSON.stringify(this._unsentEvents))}catch(e){}};Amplitude.prototype.setDomain=function(domain){try{Cookie.options({domain:domain});this.options.domain=Cookie.options().domain;_loadCookieData(this);_saveCookieData(this)}catch(e){log(e)}};Amplitude.prototype.setUserId=function(userId){try{this.options.userId=userId!==undefined&&userId!==null&&""+userId||null;_saveCookieData(this)}catch(e){log(e)}};Amplitude.prototype.setOptOut=function(enable){try{this.options.optOut=enable;_saveCookieData(this)}catch(e){log(e)}};Amplitude.prototype.setDeviceId=function(deviceId){try{if(deviceId){this.options.deviceId=""+deviceId;_saveCookieData(this)}}catch(e){log(e)}};Amplitude.prototype.setUserProperties=function(userProperties,opt_replace){try{if(opt_replace){this.options.userProperties=userProperties}else{this.options.userProperties=object.merge(this.options.userProperties||{},userProperties)}_saveCookieData(this)}catch(e){log(e)}};Amplitude.prototype.setVersionName=function(versionName){try{this.options.versionName=versionName}catch(e){log(e)}};Amplitude.prototype._logEvent=function(eventType,eventProperties,apiProperties){if(!eventType||this.options.optOut){return}try{var eventTime=(new Date).getTime();var eventId=this.nextEventId();var ua=this._ua;if(!this._sessionId||!this._lastEventTime||eventTime-this._lastEventTime>this.options.sessionTimeout){this._sessionId=eventTime;localStorage.setItem(LocalStorageKeys.SESSION_ID,this._sessionId)}this._lastEventTime=eventTime;localStorage.setItem(LocalStorageKeys.LAST_EVENT_TIME,this._lastEventTime);localStorage.setItem(LocalStorageKeys.LAST_EVENT_ID,eventId);var userProperties={};object.merge(userProperties,this.options.userProperties||{});object.merge(userProperties,this._utmProperties);if(this.options.includeReferrer&&this._getReferrer()){object.merge(userProperties,{referrer:this._getReferrer(),referring_domain:this._getReferringDomain()})}apiProperties=apiProperties||{};eventProperties=eventProperties||{};var event={device_id:this.options.deviceId,user_id:this.options.userId||this.options.deviceId,timestamp:eventTime,event_id:eventId,session_id:this._sessionId||-1,event_type:eventType,version_name:this.options.versionName||null,platform:this.options.platform,os_name:ua.browser.name||null,os_version:ua.browser.major||null,device_model:ua.os.name||null,language:this.options.language,api_properties:apiProperties,event_properties:eventProperties,user_properties:userProperties,uuid:UUID(),library:{name:"amplitude-js",version:this.__VERSION__}};this._unsentEvents.push(event);if(this._unsentEvents.length>this.options.savedMaxCount){this._unsentEvents.splice(0,this._unsentEvents.length-this.options.savedMaxCount)}if(this.options.saveEvents){this.saveEvents()}this.sendEvents();return eventId}catch(e){log(e)}};Amplitude.prototype.logEvent=function(eventType,eventProperties){return this._logEvent(eventType,eventProperties)};var _isNumber=function(n){return!isNaN(parseFloat(n))&&isFinite(n)};Amplitude.prototype.logRevenue=function(price,quantity,product){if(!_isNumber(price)||quantity!==undefined&&!_isNumber(quantity)){return}return this._logEvent("revenue_amount",{},{productId:product,special:"revenue_amount",quantity:quantity||1,price:price})};Amplitude.prototype.removeEvents=function(maxEventId){var filteredEvents=[];for(var i=0;i<this._unsentEvents.length;i++){if(this._unsentEvents[i].event_id>maxEventId){filteredEvents.push(this._unsentEvents[i])}}this._unsentEvents=filteredEvents};Amplitude.prototype.sendEvents=function(){if(!this._sending&&!this.options.optOut){this._sending=true;var url=("https:"===window.location.protocol?"https":"http")+"://"+this.options.apiEndpoint+"/";var numEvents=Math.min(this._unsentEvents.length,this.options.uploadBatchSize);var maxEventId=this._unsentEvents[numEvents-1].event_id;var events=JSON.stringify(this._unsentEvents.slice(0,numEvents));var uploadTime=(new Date).getTime();var data={client:this.options.apiKey,e:events,v:API_VERSION,upload_time:uploadTime,checksum:md5(API_VERSION+this.options.apiKey+events+uploadTime)};var scope=this;new Request(url,data).send(function(status,response){scope._sending=false;try{if(status===200&&response==="success"){scope.removeEvents(maxEventId);if(scope.options.saveEvents){scope.saveEvents()}if(scope._unsentEvents.length>0){scope.sendEvents()}}else if(status===413){if(scope.options.uploadBatchSize===1){scope.removeEvents(maxEventId)}scope.options.uploadBatchSize=Math.ceil(numEvents/2);scope.sendEvents()}}catch(e){}})}};Amplitude.prototype.setGlobalUserProperties=Amplitude.prototype.setUserProperties;Amplitude.prototype.__VERSION__=version;module.exports=Amplitude},{"./cookie":3,json:4,"./language":5,"./localstorage":6,"JavaScript-MD5":7,object:8,"./xhr":9,"ua-parser-js":10,"./uuid":11,"./version":12}],3:[function(require,module,exports){var Base64=require("./base64");var JSON=require("json");var topDomain=require("top-domain");var _options={expirationDays:undefined,domain:undefined};var reset=function(){_options={}};var options=function(opts){if(arguments.length===0){return _options}opts=opts||{};_options.expirationDays=opts.expirationDays;var domain=opts.domain!==undefined?opts.domain:"."+topDomain(window.location.href);var token=Math.random();_options.domain=domain;set("amplitude_test",token);var stored=get("amplitude_test");if(!stored||stored!==token){domain=null}remove("amplitude_test");_options.domain=domain};var _domainSpecific=function(name){var suffix="";if(_options.domain){suffix=_options.domain.charAt(0)==="."?_options.domain.substring(1):_options.domain}return name+suffix};var get=function(name){try{var nameEq=_domainSpecific(name)+"=";var ca=document.cookie.split(";");var value=null;for(var i=0;i<ca.length;i++){var c=ca[i];while(c.charAt(0)===" "){c=c.substring(1,c.length)}if(c.indexOf(nameEq)===0){value=c.substring(nameEq.length,c.length);break}}if(value){return JSON.parse(Base64.decode(value))}return null}catch(e){return null}};var set=function(name,value){try{_set(_domainSpecific(name),Base64.encode(JSON.stringify(value)),_options);return true}catch(e){return false}};var _set=function(name,value,opts){var expires=value!==null?opts.expirationDays:-1;if(expires){var date=new Date;date.setTime(date.getTime()+expires*24*60*60*1e3);expires=date}var str=name+"="+value;if(expires){str+="; expires="+expires.toUTCString()}str+="; path=/";if(opts.domain){str+="; domain="+opts.domain}document.cookie=str};var remove=function(name){try{_set(_domainSpecific(name),null,_options);return true}catch(e){return false}};module.exports={reset:reset,options:options,get:get,set:set,remove:remove}},{"./base64":13,json:4,"top-domain":14}],13:[function(require,module,exports){var UTF8=require("./utf8");var Base64={_keyStr:"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",encode:function(input){try{if(window.btoa&&window.atob){return window.btoa(unescape(encodeURIComponent(input)))}}catch(e){}return Base64._encode(input)},_encode:function(input){var output="";var chr1,chr2,chr3,enc1,enc2,enc3,enc4;var i=0;input=UTF8.encode(input);while(i<input.length){chr1=input.charCodeAt(i++);chr2=input.charCodeAt(i++);chr3=input.charCodeAt(i++);enc1=chr1>>2;enc2=(chr1&3)<<4|chr2>>4;enc3=(chr2&15)<<2|chr3>>6;enc4=chr3&63;if(isNaN(chr2)){enc3=enc4=64}else if(isNaN(chr3)){enc4=64}output=output+Base64._keyStr.charAt(enc1)+Base64._keyStr.charAt(enc2)+Base64._keyStr.charAt(enc3)+Base64._keyStr.charAt(enc4)}return output},decode:function(input){try{if(window.btoa&&window.atob){return decodeURIComponent(escape(window.atob(input)))}}catch(e){}return Base64._decode(input)},_decode:function(input){var output="";var chr1,chr2,chr3;var enc1,enc2,enc3,enc4;var i=0;input=input.replace(/[^A-Za-z0-9\+\/\=]/g,"");while(i<input.length){enc1=Base64._keyStr.indexOf(input.charAt(i++));enc2=Base64._keyStr.indexOf(input.charAt(i++));enc3=Base64._keyStr.indexOf(input.charAt(i++));enc4=Base64._keyStr.indexOf(input.charAt(i++));chr1=enc1<<2|enc2>>4;chr2=(enc2&15)<<4|enc3>>2;chr3=(enc3&3)<<6|enc4;output=output+String.fromCharCode(chr1);if(enc3!==64){output=output+String.fromCharCode(chr2)}if(enc4!==64){output=output+String.fromCharCode(chr3)}}output=UTF8.decode(output);return output}};module.exports=Base64},{"./utf8":15}],15:[function(require,module,exports){var UTF8={encode:function(s){var utftext="";for(var n=0;n<s.length;n++){var c=s.charCodeAt(n);if(c<128){utftext+=String.fromCharCode(c)}else if(c>127&&c<2048){utftext+=String.fromCharCode(c>>6|192);utftext+=String.fromCharCode(c&63|128)}else{utftext+=String.fromCharCode(c>>12|224);utftext+=String.fromCharCode(c>>6&63|128);utftext+=String.fromCharCode(c&63|128)}}return utftext},decode:function(utftext){var s="";var i=0;var c=0,c1=0,c2=0;while(i<utftext.length){c=utftext.charCodeAt(i);if(c<128){s+=String.fromCharCode(c);i++}else if(c>191&&c<224){c1=utftext.charCodeAt(i+1);s+=String.fromCharCode((c&31)<<6|c1&63);i+=2}else{c1=utftext.charCodeAt(i+1);c2=utftext.charCodeAt(i+2);s+=String.fromCharCode((c&15)<<12|(c1&63)<<6|c2&63);i+=3}}return s}};module.exports=UTF8},{}],4:[function(require,module,exports){var json=window.JSON||{};var stringify=json.stringify;var parse=json.parse;module.exports=parse&&stringify?JSON:require("json-fallback")},{"json-fallback":16}],16:[function(require,module,exports){(function(){"use strict";var JSON=module.exports={};function f(n){return n<10?"0"+n:n}if(typeof Date.prototype.toJSON!=="function"){Date.prototype.toJSON=function(){return isFinite(this.valueOf())?this.getUTCFullYear()+"-"+f(this.getUTCMonth()+1)+"-"+f(this.getUTCDate())+"T"+f(this.getUTCHours())+":"+f(this.getUTCMinutes())+":"+f(this.getUTCSeconds())+"Z":null};String.prototype.toJSON=Number.prototype.toJSON=Boolean.prototype.toJSON=function(){return this.valueOf()}}var cx,escapable,gap,indent,meta,rep;function quote(string){escapable.lastIndex=0;return escapable.test(string)?'"'+string.replace(escapable,function(a){var c=meta[a];return typeof c==="string"?c:"\\u"+("0000"+a.charCodeAt(0).toString(16)).slice(-4)})+'"':'"'+string+'"'}function str(key,holder){var i,k,v,length,mind=gap,partial,value=holder[key];if(value&&typeof value==="object"&&typeof value.toJSON==="function"){value=value.toJSON(key)}if(typeof rep==="function"){value=rep.call(holder,key,value)}switch(typeof value){case"string":return quote(value);case"number":return isFinite(value)?String(value):"null";case"boolean":case"null":return String(value);case"object":if(!value){return"null"}gap+=indent;partial=[];if(Object.prototype.toString.apply(value)==="[object Array]"){length=value.length;for(i=0;i<length;i+=1){partial[i]=str(i,value)||"null"}v=partial.length===0?"[]":gap?"[\n"+gap+partial.join(",\n"+gap)+"\n"+mind+"]":"["+partial.join(",")+"]";gap=mind;return v}if(rep&&typeof rep==="object"){length=rep.length;for(i=0;i<length;i+=1){if(typeof rep[i]==="string"){k=rep[i];v=str(k,value);if(v){partial.push(quote(k)+(gap?": ":":")+v)}}}}else{for(k in value){if(Object.prototype.hasOwnProperty.call(value,k)){v=str(k,value);if(v){partial.push(quote(k)+(gap?": ":":")+v)}}}}v=partial.length===0?"{}":gap?"{\n"+gap+partial.join(",\n"+gap)+"\n"+mind+"}":"{"+partial.join(",")+"}";gap=mind;return v}}if(typeof JSON.stringify!=="function"){escapable=/[\\\"\x00-\x1f\x7f-\x9f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g;meta={"\b":"\\b","	":"\\t","\n":"\\n","\f":"\\f","\r":"\\r",'"':'\\"',"\\":"\\\\"};JSON.stringify=function(value,replacer,space){var i;gap="";indent="";if(typeof space==="number"){for(i=0;i<space;i+=1){indent+=" "}}else if(typeof space==="string"){indent=space}rep=replacer;if(replacer&&typeof replacer!=="function"&&(typeof replacer!=="object"||typeof replacer.length!=="number")){throw new Error("JSON.stringify")}return str("",{"":value})}}if(typeof JSON.parse!=="function"){cx=/[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g;JSON.parse=function(text,reviver){var j;function walk(holder,key){var k,v,value=holder[key];if(value&&typeof value==="object"){for(k in value){if(Object.prototype.hasOwnProperty.call(value,k)){v=walk(value,k);if(v!==undefined){value[k]=v}else{delete value[k]}}}}return reviver.call(holder,key,value)}text=String(text);cx.lastIndex=0;if(cx.test(text)){text=text.replace(cx,function(a){return"\\u"+("0000"+a.charCodeAt(0).toString(16)).slice(-4)})}if(/^[\],:{}\s]*$/.test(text.replace(/\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g,"@").replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g,"]").replace(/(?:^|:|,)(?:\s*\[)+/g,""))){j=eval("("+text+")");return typeof reviver==="function"?walk({"":j},""):j}throw new SyntaxError("JSON.parse")}}})()},{}],14:[function(require,module,exports){var parse=require("url").parse;module.exports=domain;var regexp=/[a-z0-9][a-z0-9\-]*[a-z0-9]\.[a-z\.]{2,6}$/i;function domain(url){var host=parse(url).hostname;var match=host.match(regexp);return match?match[0]:""}},{url:17}],17:[function(require,module,exports){exports.parse=function(url){var a=document.createElement("a");a.href=url;return{href:a.href,host:a.host||location.host,port:"0"===a.port||""===a.port?port(a.protocol):a.port,hash:a.hash,hostname:a.hostname||location.hostname,pathname:a.pathname.charAt(0)!="/"?"/"+a.pathname:a.pathname,protocol:!a.protocol||":"==a.protocol?location.protocol:a.protocol,search:a.search,query:a.search.slice(1)}};exports.isAbsolute=function(url){return 0==url.indexOf("//")||!!~url.indexOf("://")};exports.isRelative=function(url){return!exports.isAbsolute(url)};exports.isCrossDomain=function(url){url=exports.parse(url);var location=exports.parse(window.location.href);return url.hostname!==location.hostname||url.port!==location.port||url.protocol!==location.protocol};function port(protocol){switch(protocol){case"http:":return 80;case"https:":return 443;default:return location.port}}},{}],5:[function(require,module,exports){var getLanguage=function(){return navigator&&(navigator.languages&&navigator.languages[0]||navigator.language||navigator.userLanguage)||undefined};module.exports={language:getLanguage()}},{}],6:[function(require,module,exports){var localStorage;if(window.localStorage){localStorage=window.localStorage}else if(window.globalStorage){try{localStorage=window.globalStorage[window.location.hostname]}catch(e){}}else{var div=document.createElement("div"),attrKey="localStorage";div.style.display="none";document.getElementsByTagName("head")[0].appendChild(div);if(div.addBehavior){div.addBehavior("#default#userdata");localStorage={length:0,setItem:function(k,v){div.load(attrKey);if(!div.getAttribute(k)){this.length++}div.setAttribute(k,v);div.save(attrKey)},getItem:function(k){div.load(attrKey);return div.getAttribute(k)},removeItem:function(k){div.load(attrKey);if(div.getAttribute(k)){this.length--}div.removeAttribute(k);div.save(attrKey)},clear:function(){div.load(attrKey);var i=0;var attr;while(attr=div.XMLDocument.documentElement.attributes[i++]){div.removeAttribute(attr.name)}div.save(attrKey);this.length=0},key:function(k){div.load(attrKey);return div.XMLDocument.documentElement.attributes[k]}};div.load(attrKey);localStorage.length=div.XMLDocument.documentElement.attributes.length}else{}}if(!localStorage){localStorage={length:0,setItem:function(k,v){},getItem:function(k){},removeItem:function(k){},clear:function(){},key:function(k){}}}module.exports=localStorage},{}],7:[function(require,module,exports){(function($){"use strict";function safe_add(x,y){var lsw=(x&65535)+(y&65535),msw=(x>>16)+(y>>16)+(lsw>>16);return msw<<16|lsw&65535}function bit_rol(num,cnt){return num<<cnt|num>>>32-cnt}function md5_cmn(q,a,b,x,s,t){return safe_add(bit_rol(safe_add(safe_add(a,q),safe_add(x,t)),s),b)}function md5_ff(a,b,c,d,x,s,t){return md5_cmn(b&c|~b&d,a,b,x,s,t)}function md5_gg(a,b,c,d,x,s,t){return md5_cmn(b&d|c&~d,a,b,x,s,t)}function md5_hh(a,b,c,d,x,s,t){return md5_cmn(b^c^d,a,b,x,s,t)}function md5_ii(a,b,c,d,x,s,t){return md5_cmn(c^(b|~d),a,b,x,s,t)}function binl_md5(x,len){x[len>>5]|=128<<len%32;x[(len+64>>>9<<4)+14]=len;var i,olda,oldb,oldc,oldd,a=1732584193,b=-271733879,c=-1732584194,d=271733878;for(i=0;i<x.length;i+=16){olda=a;oldb=b;oldc=c;oldd=d;a=md5_ff(a,b,c,d,x[i],7,-680876936);d=md5_ff(d,a,b,c,x[i+1],12,-389564586);c=md5_ff(c,d,a,b,x[i+2],17,606105819);b=md5_ff(b,c,d,a,x[i+3],22,-1044525330);a=md5_ff(a,b,c,d,x[i+4],7,-176418897);d=md5_ff(d,a,b,c,x[i+5],12,1200080426);c=md5_ff(c,d,a,b,x[i+6],17,-1473231341);b=md5_ff(b,c,d,a,x[i+7],22,-45705983);a=md5_ff(a,b,c,d,x[i+8],7,1770035416);d=md5_ff(d,a,b,c,x[i+9],12,-1958414417);c=md5_ff(c,d,a,b,x[i+10],17,-42063);b=md5_ff(b,c,d,a,x[i+11],22,-1990404162);a=md5_ff(a,b,c,d,x[i+12],7,1804603682);d=md5_ff(d,a,b,c,x[i+13],12,-40341101);c=md5_ff(c,d,a,b,x[i+14],17,-1502002290);b=md5_ff(b,c,d,a,x[i+15],22,1236535329);a=md5_gg(a,b,c,d,x[i+1],5,-165796510);d=md5_gg(d,a,b,c,x[i+6],9,-1069501632);c=md5_gg(c,d,a,b,x[i+11],14,643717713);b=md5_gg(b,c,d,a,x[i],20,-373897302);a=md5_gg(a,b,c,d,x[i+5],5,-701558691);d=md5_gg(d,a,b,c,x[i+10],9,38016083);c=md5_gg(c,d,a,b,x[i+15],14,-660478335);b=md5_gg(b,c,d,a,x[i+4],20,-405537848);a=md5_gg(a,b,c,d,x[i+9],5,568446438);d=md5_gg(d,a,b,c,x[i+14],9,-1019803690);c=md5_gg(c,d,a,b,x[i+3],14,-187363961);b=md5_gg(b,c,d,a,x[i+8],20,1163531501);a=md5_gg(a,b,c,d,x[i+13],5,-1444681467);d=md5_gg(d,a,b,c,x[i+2],9,-51403784);c=md5_gg(c,d,a,b,x[i+7],14,1735328473);b=md5_gg(b,c,d,a,x[i+12],20,-1926607734);a=md5_hh(a,b,c,d,x[i+5],4,-378558);d=md5_hh(d,a,b,c,x[i+8],11,-2022574463);c=md5_hh(c,d,a,b,x[i+11],16,1839030562);b=md5_hh(b,c,d,a,x[i+14],23,-35309556);a=md5_hh(a,b,c,d,x[i+1],4,-1530992060);d=md5_hh(d,a,b,c,x[i+4],11,1272893353);c=md5_hh(c,d,a,b,x[i+7],16,-155497632);b=md5_hh(b,c,d,a,x[i+10],23,-1094730640);a=md5_hh(a,b,c,d,x[i+13],4,681279174);d=md5_hh(d,a,b,c,x[i],11,-358537222);c=md5_hh(c,d,a,b,x[i+3],16,-722521979);b=md5_hh(b,c,d,a,x[i+6],23,76029189);a=md5_hh(a,b,c,d,x[i+9],4,-640364487);d=md5_hh(d,a,b,c,x[i+12],11,-421815835);c=md5_hh(c,d,a,b,x[i+15],16,530742520);b=md5_hh(b,c,d,a,x[i+2],23,-995338651);a=md5_ii(a,b,c,d,x[i],6,-198630844);d=md5_ii(d,a,b,c,x[i+7],10,1126891415);c=md5_ii(c,d,a,b,x[i+14],15,-1416354905);b=md5_ii(b,c,d,a,x[i+5],21,-57434055);a=md5_ii(a,b,c,d,x[i+12],6,1700485571);d=md5_ii(d,a,b,c,x[i+3],10,-1894986606);c=md5_ii(c,d,a,b,x[i+10],15,-1051523);b=md5_ii(b,c,d,a,x[i+1],21,-2054922799);a=md5_ii(a,b,c,d,x[i+8],6,1873313359);d=md5_ii(d,a,b,c,x[i+15],10,-30611744);c=md5_ii(c,d,a,b,x[i+6],15,-1560198380);b=md5_ii(b,c,d,a,x[i+13],21,1309151649);a=md5_ii(a,b,c,d,x[i+4],6,-145523070);d=md5_ii(d,a,b,c,x[i+11],10,-1120210379);c=md5_ii(c,d,a,b,x[i+2],15,718787259);b=md5_ii(b,c,d,a,x[i+9],21,-343485551);a=safe_add(a,olda);b=safe_add(b,oldb);c=safe_add(c,oldc);d=safe_add(d,oldd)}return[a,b,c,d]}function binl2rstr(input){var i,output="";for(i=0;i<input.length*32;i+=8){output+=String.fromCharCode(input[i>>5]>>>i%32&255)}return output}function rstr2binl(input){var i,output=[];output[(input.length>>2)-1]=undefined;for(i=0;i<output.length;i+=1){output[i]=0}for(i=0;i<input.length*8;i+=8){output[i>>5]|=(input.charCodeAt(i/8)&255)<<i%32}return output}function rstr_md5(s){return binl2rstr(binl_md5(rstr2binl(s),s.length*8))}function rstr_hmac_md5(key,data){var i,bkey=rstr2binl(key),ipad=[],opad=[],hash;ipad[15]=opad[15]=undefined;if(bkey.length>16){bkey=binl_md5(bkey,key.length*8)}for(i=0;i<16;i+=1){ipad[i]=bkey[i]^909522486;opad[i]=bkey[i]^1549556828}hash=binl_md5(ipad.concat(rstr2binl(data)),512+data.length*8);return binl2rstr(binl_md5(opad.concat(hash),512+128))}function rstr2hex(input){var hex_tab="0123456789abcdef",output="",x,i;for(i=0;i<input.length;i+=1){x=input.charCodeAt(i);output+=hex_tab.charAt(x>>>4&15)+hex_tab.charAt(x&15)}return output}function str2rstr_utf8(input){return unescape(encodeURIComponent(input))}function raw_md5(s){return rstr_md5(str2rstr_utf8(s))}function hex_md5(s){return rstr2hex(raw_md5(s))}function raw_hmac_md5(k,d){return rstr_hmac_md5(str2rstr_utf8(k),str2rstr_utf8(d))}function hex_hmac_md5(k,d){return rstr2hex(raw_hmac_md5(k,d))}function md5(string,key,raw){if(!key){if(!raw){return hex_md5(string)}return raw_md5(string)}if(!raw){return hex_hmac_md5(key,string)}return raw_hmac_md5(key,string)}if(typeof exports!=="undefined"){if(typeof module!=="undefined"&&module.exports){exports=module.exports=md5}exports.md5=md5}else{if(typeof define==="function"&&define.amd){define(function(){return md5})}else{$.md5=md5}}})(this)},{}],8:[function(require,module,exports){var has=Object.prototype.hasOwnProperty;exports.keys=Object.keys||function(obj){var keys=[];for(var key in obj){if(has.call(obj,key)){keys.push(key)}}return keys};exports.values=function(obj){var vals=[];for(var key in obj){if(has.call(obj,key)){vals.push(obj[key])}}return vals};exports.merge=function(a,b){for(var key in b){if(has.call(b,key)){a[key]=b[key]}}return a};exports.length=function(obj){return exports.keys(obj).length};exports.isEmpty=function(obj){return 0==exports.length(obj)}},{}],9:[function(require,module,exports){var querystring=require("querystring");var Request=function(url,data){this.url=url;this.data=data||{}};Request.prototype.send=function(callback){var isIE=window.XDomainRequest?true:false;if(isIE){var xdr=new window.XDomainRequest;xdr.open("POST",this.url,true);xdr.onload=function(){callback(xdr.responseText)};xdr.send(querystring.stringify(this.data))}else{var xhr=new XMLHttpRequest;xhr.open("POST",this.url,true);xhr.onreadystatechange=function(){if(xhr.readyState===4){callback(xhr.status,xhr.responseText)}};xhr.setRequestHeader("Content-Type","application/x-www-form-urlencoded; charset=UTF-8");xhr.send(querystring.stringify(this.data))}};module.exports=Request},{querystring:18}],18:[function(require,module,exports){var encode=encodeURIComponent;var decode=decodeURIComponent;var trim=require("trim");var type=require("type");exports.parse=function(str){if("string"!=typeof str)return{};str=trim(str);if(""==str)return{};if("?"==str.charAt(0))str=str.slice(1);var obj={};var pairs=str.split("&");for(var i=0;i<pairs.length;i++){var parts=pairs[i].split("=");var key=decode(parts[0]);var m;if(m=/(\w+)\[(\d+)\]/.exec(key)){obj[m[1]]=obj[m[1]]||[];obj[m[1]][m[2]]=decode(parts[1]);continue}obj[parts[0]]=null==parts[1]?"":decode(parts[1])}return obj};exports.stringify=function(obj){if(!obj)return"";var pairs=[];for(var key in obj){var value=obj[key];if("array"==type(value)){for(var i=0;i<value.length;++i){pairs.push(encode(key+"["+i+"]")+"="+encode(value[i]))}continue}pairs.push(encode(key)+"="+encode(obj[key]))}return pairs.join("&")}},{trim:19,type:20}],19:[function(require,module,exports){exports=module.exports=trim;function trim(str){if(str.trim)return str.trim();return str.replace(/^\s*|\s*$/g,"")}exports.left=function(str){if(str.trimLeft)return str.trimLeft();return str.replace(/^\s*/,"")};exports.right=function(str){if(str.trimRight)return str.trimRight();return str.replace(/\s*$/,"")}},{}],20:[function(require,module,exports){var toString=Object.prototype.toString;module.exports=function(val){switch(toString.call(val)){case"[object Date]":return"date";case"[object RegExp]":return"regexp";case"[object Arguments]":return"arguments";case"[object Array]":return"array";case"[object Error]":return"error"}if(val===null)return"null";if(val===undefined)return"undefined";if(val!==val)return"nan";if(val&&val.nodeType===1)return"element";val=val.valueOf?val.valueOf():Object.prototype.valueOf.apply(val);return typeof val}},{}],10:[function(require,module,exports){(function(window,undefined){"use strict";var LIBVERSION="0.7.7",EMPTY="",UNKNOWN="?",FUNC_TYPE="function",UNDEF_TYPE="undefined",OBJ_TYPE="object",STR_TYPE="string",MAJOR="major",MODEL="model",NAME="name",TYPE="type",VENDOR="vendor",VERSION="version",ARCHITECTURE="architecture",CONSOLE="console",MOBILE="mobile",TABLET="tablet",SMARTTV="smarttv",WEARABLE="wearable",EMBEDDED="embedded";var util={extend:function(regexes,extensions){for(var i in extensions){if("browser cpu device engine os".indexOf(i)!==-1&&extensions[i].length%2===0){regexes[i]=extensions[i].concat(regexes[i])}}return regexes},has:function(str1,str2){if(typeof str1==="string"){return str2.toLowerCase().indexOf(str1.toLowerCase())!==-1}else{return false}},lowerize:function(str){return str.toLowerCase()},major:function(version){return typeof version===STR_TYPE?version.split(".")[0]:undefined}};var mapper={rgx:function(){var result,i=0,j,k,p,q,matches,match,args=arguments;while(i<args.length&&!matches){var regex=args[i],props=args[i+1];if(typeof result===UNDEF_TYPE){result={};for(p in props){q=props[p];if(typeof q===OBJ_TYPE){result[q[0]]=undefined}else{result[q]=undefined}}}j=k=0;while(j<regex.length&&!matches){matches=regex[j++].exec(this.getUA());if(!!matches){for(p=0;p<props.length;p++){match=matches[++k];q=props[p];if(typeof q===OBJ_TYPE&&q.length>0){if(q.length==2){if(typeof q[1]==FUNC_TYPE){result[q[0]]=q[1].call(this,match)}else{result[q[0]]=q[1]}}else if(q.length==3){if(typeof q[1]===FUNC_TYPE&&!(q[1].exec&&q[1].test)){result[q[0]]=match?q[1].call(this,match,q[2]):undefined}else{result[q[0]]=match?match.replace(q[1],q[2]):undefined}}else if(q.length==4){result[q[0]]=match?q[3].call(this,match.replace(q[1],q[2])):undefined}}else{result[q]=match?match:undefined}}}}i+=2}return result},str:function(str,map){for(var i in map){if(typeof map[i]===OBJ_TYPE&&map[i].length>0){
+(function umd(require){if("object"==typeof exports){module.exports=require("1")}else if("function"==typeof define&&define.amd){define(function(){return require("1")})}else{this["amplitude"]=require("1")}})(function outer(modules,cache,entries){var global=function(){return this}();function require(name,jumped){if(cache[name])return cache[name].exports;if(modules[name])return call(name,require);throw new Error('cannot find module "'+name+'"')}function call(id,require){var m=cache[id]={exports:{}};var mod=modules[id];var name=mod[2];var fn=mod[0];fn.call(m.exports,function(req){var dep=modules[id][1][req];return require(dep?dep:req)},m,m.exports,outer,modules,cache,entries);if(name)cache[name]=cache[id];return cache[id].exports}for(var id in entries){if(entries[id]){global[entries[id]]=require(id)}else{require(id)}}require.duo=true;require.cache=cache;require.modules=modules;return require}({1:[function(require,module,exports){var Amplitude=require("./amplitude");var old=window.amplitude||{};var q=old._q||[];var instance=new Amplitude;for(var i=0;i<q.length;i++){var fn=instance[q[i][0]];fn&&fn.apply(instance,q[i].slice(1))}module.exports=instance},{"./amplitude":2}],2:[function(require,module,exports){var Cookie=require("./cookie");var JSON=require("json");var language=require("./language");var localStorage=require("./localstorage");var md5=require("JavaScript-MD5");var object=require("object");var Request=require("./xhr");var UAParser=require("ua-parser-js");var UUID=require("./uuid");var version=require("./version");var log=function(s){console.log("[Amplitude] "+s)};var API_VERSION=2;var DEFAULT_OPTIONS={apiEndpoint:"api.amplitude.com",cookieExpiration:365*10,cookieName:"amplitude_id",domain:undefined,includeUtm:false,language:language.language,optOut:false,platform:"Web",savedMaxCount:1e3,saveEvents:true,sessionTimeout:30*60*1e3,unsentKey:"amplitude_unsent",uploadBatchSize:100};var LocalStorageKeys={LAST_EVENT_ID:"amplitude_lastEventId",LAST_EVENT_TIME:"amplitude_lastEventTime",SESSION_ID:"amplitude_sessionId"};var Amplitude=function(){this._unsentEvents=[];this._ua=new UAParser(navigator.userAgent).getResult();this.options=object.merge({},DEFAULT_OPTIONS)};Amplitude.prototype._eventId=0;Amplitude.prototype._sending=false;Amplitude.prototype._lastEventTime=null;Amplitude.prototype._sessionId=null;Amplitude.prototype._newSession=false;Amplitude.prototype.init=function(apiKey,opt_userId,opt_config){try{this.options.apiKey=apiKey;if(opt_config){if(opt_config.saveEvents!==undefined){this.options.saveEvents=!!opt_config.saveEvents}if(opt_config.domain!==undefined){this.options.domain=opt_config.domain}if(opt_config.includeUtm!==undefined){this.options.includeUtm=!!opt_config.includeUtm}if(opt_config.includeReferrer!==undefined){this.options.includeReferrer=!!opt_config.includeReferrer}this.options.platform=opt_config.platform||this.options.platform;this.options.language=opt_config.language||this.options.language;this.options.sessionTimeout=opt_config.sessionTimeout||this.options.sessionTimeout;this.options.uploadBatchSize=opt_config.uploadBatchSize||this.options.uploadBatchSize;this.options.savedMaxCount=opt_config.savedMaxCount||this.options.savedMaxCount}Cookie.options({expirationDays:this.options.cookieExpiration,domain:this.options.domain});this.options.domain=Cookie.options().domain;_loadCookieData(this);this.options.deviceId=opt_config&&opt_config.deviceId!==undefined&&opt_config.deviceId!==null&&opt_config.deviceId||this.options.deviceId||UUID();this.options.userId=opt_userId!==undefined&&opt_userId!==null&&opt_userId||this.options.userId||null;_saveCookieData(this);if(this.options.saveEvents){var savedUnsentEventsString=localStorage.getItem(this.options.unsentKey);if(savedUnsentEventsString){try{this._unsentEvents=JSON.parse(savedUnsentEventsString)}catch(e){}}}if(this._unsentEvents.length>0){this.sendEvents()}if(this.options.includeUtm){this._initUtmData()}this._lastEventTime=parseInt(localStorage.getItem(LocalStorageKeys.LAST_EVENT_TIME))||null;this._sessionId=parseInt(localStorage.getItem(LocalStorageKeys.SESSION_ID))||null;this._eventId=localStorage.getItem(LocalStorageKeys.LAST_EVENT_ID)||0;var now=(new Date).getTime();if(!this._sessionId||!this._lastEventTime||now-this._lastEventTime>this.options.sessionTimeout){this._newSession=true;this._sessionId=now;localStorage.setItem(LocalStorageKeys.SESSION_ID,this._sessionId)}this._lastEventTime=now;localStorage.setItem(LocalStorageKeys.LAST_EVENT_TIME,this._lastEventTime)}catch(e){log(e)}};Amplitude.prototype.isNewSession=function(){return this._newSession};Amplitude.prototype.nextEventId=function(){this._eventId++;return this._eventId};var _loadCookieData=function(scope){var cookieData=Cookie.get(scope.options.cookieName);if(cookieData){if(cookieData.deviceId){scope.options.deviceId=cookieData.deviceId}if(cookieData.userId){scope.options.userId=cookieData.userId}if(cookieData.globalUserProperties){scope.options.userProperties=cookieData.globalUserProperties}if(cookieData.optOut!==undefined){scope.options.optOut=cookieData.optOut}}};var _saveCookieData=function(scope){Cookie.set(scope.options.cookieName,{deviceId:scope.options.deviceId,userId:scope.options.userId,globalUserProperties:scope.options.userProperties,optOut:scope.options.optOut})};Amplitude._getUtmParam=function(name,query){name=name.replace(/[\[]/,"\\[").replace(/[\]]/,"\\]");var regex=new RegExp("[\\?&]"+name+"=([^&#]*)");var results=regex.exec(query);return results===null?undefined:decodeURIComponent(results[1].replace(/\+/g," "))};Amplitude._getUtmData=function(rawCookie,query){var cookie=rawCookie?"?"+rawCookie.split(".").slice(-1)[0].replace(/\|/g,"&"):"";var fetchParam=function(queryName,query,cookieName,cookie){return Amplitude._getUtmParam(queryName,query)||Amplitude._getUtmParam(cookieName,cookie)};return{utm_source:fetchParam("utm_source",query,"utmcsr",cookie),utm_medium:fetchParam("utm_medium",query,"utmcmd",cookie),utm_campaign:fetchParam("utm_campaign",query,"utmccn",cookie),utm_term:fetchParam("utm_term",query,"utmctr",cookie),utm_content:fetchParam("utm_content",query,"utmcct",cookie)}};Amplitude.prototype._initUtmData=function(queryParams,cookieParams){queryParams=queryParams||location.search;cookieParams=cookieParams||Cookie.get("__utmz");this._utmProperties=Amplitude._getUtmData(cookieParams,queryParams)};Amplitude.prototype._getReferrer=function(){return document.referrer};Amplitude.prototype._getReferringDomain=function(){var parts=this._getReferrer().split("/");if(parts.length>=3){return parts[2]}return""};Amplitude.prototype.saveEvents=function(){try{localStorage.setItem(this.options.unsentKey,JSON.stringify(this._unsentEvents))}catch(e){}};Amplitude.prototype.setDomain=function(domain){try{Cookie.options({domain:domain});this.options.domain=Cookie.options().domain;_loadCookieData(this);_saveCookieData(this)}catch(e){log(e)}};Amplitude.prototype.setUserId=function(userId){try{this.options.userId=userId!==undefined&&userId!==null&&""+userId||null;_saveCookieData(this)}catch(e){log(e)}};Amplitude.prototype.setOptOut=function(enable){try{this.options.optOut=enable;_saveCookieData(this)}catch(e){log(e)}};Amplitude.prototype.setDeviceId=function(deviceId){try{if(deviceId){this.options.deviceId=""+deviceId;_saveCookieData(this)}}catch(e){log(e)}};Amplitude.prototype.setUserProperties=function(userProperties,opt_replace){try{if(opt_replace){this.options.userProperties=userProperties}else{this.options.userProperties=object.merge(this.options.userProperties||{},userProperties)}_saveCookieData(this)}catch(e){log(e)}};Amplitude.prototype.setVersionName=function(versionName){try{this.options.versionName=versionName}catch(e){log(e)}};Amplitude.prototype._logEvent=function(eventType,eventProperties,apiProperties){if(!eventType||this.options.optOut){return}try{var eventTime=(new Date).getTime();var eventId=this.nextEventId();var ua=this._ua;if(!this._sessionId||!this._lastEventTime||eventTime-this._lastEventTime>this.options.sessionTimeout){this._sessionId=eventTime;localStorage.setItem(LocalStorageKeys.SESSION_ID,this._sessionId)}this._lastEventTime=eventTime;localStorage.setItem(LocalStorageKeys.LAST_EVENT_TIME,this._lastEventTime);localStorage.setItem(LocalStorageKeys.LAST_EVENT_ID,eventId);var userProperties={};object.merge(userProperties,this.options.userProperties||{});object.merge(userProperties,this._utmProperties);if(this.options.includeReferrer){object.merge(userProperties,{referrer:this._getReferrer(),referring_domain:this._getReferringDomain()})}apiProperties=apiProperties||{};eventProperties=eventProperties||{};var event={device_id:this.options.deviceId,user_id:this.options.userId||this.options.deviceId,timestamp:eventTime,event_id:eventId,session_id:this._sessionId||-1,event_type:eventType,version_name:this.options.versionName||null,platform:this.options.platform,os_name:ua.browser.name||null,os_version:ua.browser.major||null,device_model:ua.os.name||null,language:this.options.language,api_properties:apiProperties,event_properties:eventProperties,user_properties:userProperties,uuid:UUID(),library:{name:"amplitude-js",version:this.__VERSION__}};this._unsentEvents.push(event);if(this._unsentEvents.length>this.options.savedMaxCount){this._unsentEvents.splice(0,this._unsentEvents.length-this.options.savedMaxCount)}if(this.options.saveEvents){this.saveEvents()}this.sendEvents();return eventId}catch(e){log(e)}};Amplitude.prototype.logEvent=function(eventType,eventProperties){return this._logEvent(eventType,eventProperties)};var _isNumber=function(n){return!isNaN(parseFloat(n))&&isFinite(n)};Amplitude.prototype.logRevenue=function(price,quantity,product){if(!_isNumber(price)||quantity!==undefined&&!_isNumber(quantity)){return}return this._logEvent("revenue_amount",{},{productId:product,special:"revenue_amount",quantity:quantity||1,price:price})};Amplitude.prototype.removeEvents=function(maxEventId){var filteredEvents=[];for(var i=0;i<this._unsentEvents.length;i++){if(this._unsentEvents[i].event_id>maxEventId){filteredEvents.push(this._unsentEvents[i])}}this._unsentEvents=filteredEvents};Amplitude.prototype.sendEvents=function(){if(!this._sending&&!this.options.optOut){this._sending=true;var url=("https:"===window.location.protocol?"https":"http")+"://"+this.options.apiEndpoint+"/";var numEvents=Math.min(this._unsentEvents.length,this.options.uploadBatchSize);var maxEventId=this._unsentEvents[numEvents-1].event_id;var events=JSON.stringify(this._unsentEvents.slice(0,numEvents));var uploadTime=(new Date).getTime();var data={client:this.options.apiKey,e:events,v:API_VERSION,upload_time:uploadTime,checksum:md5(API_VERSION+this.options.apiKey+events+uploadTime)};var scope=this;new Request(url,data).send(function(status,response){scope._sending=false;try{if(status===200&&response==="success"){scope.removeEvents(maxEventId);if(scope.options.saveEvents){scope.saveEvents()}if(scope._unsentEvents.length>0){scope.sendEvents()}}else if(status===413){if(scope.options.uploadBatchSize===1){scope.removeEvents(maxEventId)}scope.options.uploadBatchSize=Math.ceil(numEvents/2);scope.sendEvents()}}catch(e){}})}};Amplitude.prototype.setGlobalUserProperties=Amplitude.prototype.setUserProperties;Amplitude.prototype.__VERSION__=version;module.exports=Amplitude},{"./cookie":3,json:4,"./language":5,"./localstorage":6,"JavaScript-MD5":7,object:8,"./xhr":9,"ua-parser-js":10,"./uuid":11,"./version":12}],3:[function(require,module,exports){var Base64=require("./base64");var JSON=require("json");var topDomain=require("top-domain");var _options={expirationDays:undefined,domain:undefined};var reset=function(){_options={}};var options=function(opts){if(arguments.length===0){return _options}opts=opts||{};_options.expirationDays=opts.expirationDays;var domain=opts.domain!==undefined?opts.domain:"."+topDomain(window.location.href);var token=Math.random();_options.domain=domain;set("amplitude_test",token);var stored=get("amplitude_test");if(!stored||stored!==token){domain=null}remove("amplitude_test");_options.domain=domain};var _domainSpecific=function(name){var suffix="";if(_options.domain){suffix=_options.domain.charAt(0)==="."?_options.domain.substring(1):_options.domain}return name+suffix};var get=function(name){try{var nameEq=_domainSpecific(name)+"=";var ca=document.cookie.split(";");var value=null;for(var i=0;i<ca.length;i++){var c=ca[i];while(c.charAt(0)===" "){c=c.substring(1,c.length)}if(c.indexOf(nameEq)===0){value=c.substring(nameEq.length,c.length);break}}if(value){return JSON.parse(Base64.decode(value))}return null}catch(e){return null}};var set=function(name,value){try{_set(_domainSpecific(name),Base64.encode(JSON.stringify(value)),_options);return true}catch(e){return false}};var _set=function(name,value,opts){var expires=value!==null?opts.expirationDays:-1;if(expires){var date=new Date;date.setTime(date.getTime()+expires*24*60*60*1e3);expires=date}var str=name+"="+value;if(expires){str+="; expires="+expires.toUTCString()}str+="; path=/";if(opts.domain){str+="; domain="+opts.domain}document.cookie=str};var remove=function(name){try{_set(_domainSpecific(name),null,_options);return true}catch(e){return false}};module.exports={reset:reset,options:options,get:get,set:set,remove:remove}},{"./base64":13,json:4,"top-domain":14}],13:[function(require,module,exports){var UTF8=require("./utf8");var Base64={_keyStr:"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",encode:function(input){try{if(window.btoa&&window.atob){return window.btoa(unescape(encodeURIComponent(input)))}}catch(e){}return Base64._encode(input)},_encode:function(input){var output="";var chr1,chr2,chr3,enc1,enc2,enc3,enc4;var i=0;input=UTF8.encode(input);while(i<input.length){chr1=input.charCodeAt(i++);chr2=input.charCodeAt(i++);chr3=input.charCodeAt(i++);enc1=chr1>>2;enc2=(chr1&3)<<4|chr2>>4;enc3=(chr2&15)<<2|chr3>>6;enc4=chr3&63;if(isNaN(chr2)){enc3=enc4=64}else if(isNaN(chr3)){enc4=64}output=output+Base64._keyStr.charAt(enc1)+Base64._keyStr.charAt(enc2)+Base64._keyStr.charAt(enc3)+Base64._keyStr.charAt(enc4)}return output},decode:function(input){try{if(window.btoa&&window.atob){return decodeURIComponent(escape(window.atob(input)))}}catch(e){}return Base64._decode(input)},_decode:function(input){var output="";var chr1,chr2,chr3;var enc1,enc2,enc3,enc4;var i=0;input=input.replace(/[^A-Za-z0-9\+\/\=]/g,"");while(i<input.length){enc1=Base64._keyStr.indexOf(input.charAt(i++));enc2=Base64._keyStr.indexOf(input.charAt(i++));enc3=Base64._keyStr.indexOf(input.charAt(i++));enc4=Base64._keyStr.indexOf(input.charAt(i++));chr1=enc1<<2|enc2>>4;chr2=(enc2&15)<<4|enc3>>2;chr3=(enc3&3)<<6|enc4;output=output+String.fromCharCode(chr1);if(enc3!==64){output=output+String.fromCharCode(chr2)}if(enc4!==64){output=output+String.fromCharCode(chr3)}}output=UTF8.decode(output);return output}};module.exports=Base64},{"./utf8":15}],15:[function(require,module,exports){var UTF8={encode:function(s){var utftext="";for(var n=0;n<s.length;n++){var c=s.charCodeAt(n);if(c<128){utftext+=String.fromCharCode(c)}else if(c>127&&c<2048){utftext+=String.fromCharCode(c>>6|192);utftext+=String.fromCharCode(c&63|128)}else{utftext+=String.fromCharCode(c>>12|224);utftext+=String.fromCharCode(c>>6&63|128);utftext+=String.fromCharCode(c&63|128)}}return utftext},decode:function(utftext){var s="";var i=0;var c=0,c1=0,c2=0;while(i<utftext.length){c=utftext.charCodeAt(i);if(c<128){s+=String.fromCharCode(c);i++}else if(c>191&&c<224){c1=utftext.charCodeAt(i+1);s+=String.fromCharCode((c&31)<<6|c1&63);i+=2}else{c1=utftext.charCodeAt(i+1);c2=utftext.charCodeAt(i+2);s+=String.fromCharCode((c&15)<<12|(c1&63)<<6|c2&63);i+=3}}return s}};module.exports=UTF8},{}],4:[function(require,module,exports){var json=window.JSON||{};var stringify=json.stringify;var parse=json.parse;module.exports=parse&&stringify?JSON:require("json-fallback")},{"json-fallback":16}],16:[function(require,module,exports){(function(){"use strict";var JSON=module.exports={};function f(n){return n<10?"0"+n:n}if(typeof Date.prototype.toJSON!=="function"){Date.prototype.toJSON=function(){return isFinite(this.valueOf())?this.getUTCFullYear()+"-"+f(this.getUTCMonth()+1)+"-"+f(this.getUTCDate())+"T"+f(this.getUTCHours())+":"+f(this.getUTCMinutes())+":"+f(this.getUTCSeconds())+"Z":null};String.prototype.toJSON=Number.prototype.toJSON=Boolean.prototype.toJSON=function(){return this.valueOf()}}var cx,escapable,gap,indent,meta,rep;function quote(string){escapable.lastIndex=0;return escapable.test(string)?'"'+string.replace(escapable,function(a){var c=meta[a];return typeof c==="string"?c:"\\u"+("0000"+a.charCodeAt(0).toString(16)).slice(-4)})+'"':'"'+string+'"'}function str(key,holder){var i,k,v,length,mind=gap,partial,value=holder[key];if(value&&typeof value==="object"&&typeof value.toJSON==="function"){value=value.toJSON(key)}if(typeof rep==="function"){value=rep.call(holder,key,value)}switch(typeof value){case"string":return quote(value);case"number":return isFinite(value)?String(value):"null";case"boolean":case"null":return String(value);case"object":if(!value){return"null"}gap+=indent;partial=[];if(Object.prototype.toString.apply(value)==="[object Array]"){length=value.length;for(i=0;i<length;i+=1){partial[i]=str(i,value)||"null"}v=partial.length===0?"[]":gap?"[\n"+gap+partial.join(",\n"+gap)+"\n"+mind+"]":"["+partial.join(",")+"]";gap=mind;return v}if(rep&&typeof rep==="object"){length=rep.length;for(i=0;i<length;i+=1){if(typeof rep[i]==="string"){k=rep[i];v=str(k,value);if(v){partial.push(quote(k)+(gap?": ":":")+v)}}}}else{for(k in value){if(Object.prototype.hasOwnProperty.call(value,k)){v=str(k,value);if(v){partial.push(quote(k)+(gap?": ":":")+v)}}}}v=partial.length===0?"{}":gap?"{\n"+gap+partial.join(",\n"+gap)+"\n"+mind+"}":"{"+partial.join(",")+"}";gap=mind;return v}}if(typeof JSON.stringify!=="function"){escapable=/[\\\"\x00-\x1f\x7f-\x9f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g;meta={"\b":"\\b","	":"\\t","\n":"\\n","\f":"\\f","\r":"\\r",'"':'\\"',"\\":"\\\\"};JSON.stringify=function(value,replacer,space){var i;gap="";indent="";if(typeof space==="number"){for(i=0;i<space;i+=1){indent+=" "}}else if(typeof space==="string"){indent=space}rep=replacer;if(replacer&&typeof replacer!=="function"&&(typeof replacer!=="object"||typeof replacer.length!=="number")){throw new Error("JSON.stringify")}return str("",{"":value})}}if(typeof JSON.parse!=="function"){cx=/[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g;JSON.parse=function(text,reviver){var j;function walk(holder,key){var k,v,value=holder[key];if(value&&typeof value==="object"){for(k in value){if(Object.prototype.hasOwnProperty.call(value,k)){v=walk(value,k);if(v!==undefined){value[k]=v}else{delete value[k]}}}}return reviver.call(holder,key,value)}text=String(text);cx.lastIndex=0;if(cx.test(text)){text=text.replace(cx,function(a){return"\\u"+("0000"+a.charCodeAt(0).toString(16)).slice(-4)})}if(/^[\],:{}\s]*$/.test(text.replace(/\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g,"@").replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g,"]").replace(/(?:^|:|,)(?:\s*\[)+/g,""))){j=eval("("+text+")");return typeof reviver==="function"?walk({"":j},""):j}throw new SyntaxError("JSON.parse")}}})()},{}],14:[function(require,module,exports){var parse=require("url").parse;module.exports=domain;var regexp=/[a-z0-9][a-z0-9\-]*[a-z0-9]\.[a-z\.]{2,6}$/i;function domain(url){var host=parse(url).hostname;var match=host.match(regexp);return match?match[0]:""}},{url:17}],17:[function(require,module,exports){exports.parse=function(url){var a=document.createElement("a");a.href=url;return{href:a.href,host:a.host||location.host,port:"0"===a.port||""===a.port?port(a.protocol):a.port,hash:a.hash,hostname:a.hostname||location.hostname,pathname:a.pathname.charAt(0)!="/"?"/"+a.pathname:a.pathname,protocol:!a.protocol||":"==a.protocol?location.protocol:a.protocol,search:a.search,query:a.search.slice(1)}};exports.isAbsolute=function(url){return 0==url.indexOf("//")||!!~url.indexOf("://")};exports.isRelative=function(url){return!exports.isAbsolute(url)};exports.isCrossDomain=function(url){url=exports.parse(url);var location=exports.parse(window.location.href);return url.hostname!==location.hostname||url.port!==location.port||url.protocol!==location.protocol};function port(protocol){switch(protocol){case"http:":return 80;case"https:":return 443;default:return location.port}}},{}],5:[function(require,module,exports){var getLanguage=function(){return navigator&&(navigator.languages&&navigator.languages[0]||navigator.language||navigator.userLanguage)||undefined};module.exports={language:getLanguage()}},{}],6:[function(require,module,exports){var localStorage;if(window.localStorage){localStorage=window.localStorage}else if(window.globalStorage){try{localStorage=window.globalStorage[window.location.hostname]}catch(e){}}else{var div=document.createElement("div"),attrKey="localStorage";div.style.display="none";document.getElementsByTagName("head")[0].appendChild(div);if(div.addBehavior){div.addBehavior("#default#userdata");localStorage={length:0,setItem:function(k,v){div.load(attrKey);if(!div.getAttribute(k)){this.length++}div.setAttribute(k,v);div.save(attrKey)},getItem:function(k){div.load(attrKey);return div.getAttribute(k)},removeItem:function(k){div.load(attrKey);if(div.getAttribute(k)){this.length--}div.removeAttribute(k);div.save(attrKey)},clear:function(){div.load(attrKey);var i=0;var attr;while(attr=div.XMLDocument.documentElement.attributes[i++]){div.removeAttribute(attr.name)}div.save(attrKey);this.length=0},key:function(k){div.load(attrKey);return div.XMLDocument.documentElement.attributes[k]}};div.load(attrKey);localStorage.length=div.XMLDocument.documentElement.attributes.length}else{}}if(!localStorage){localStorage={length:0,setItem:function(k,v){},getItem:function(k){},removeItem:function(k){},clear:function(){},key:function(k){}}}module.exports=localStorage},{}],7:[function(require,module,exports){(function($){"use strict";function safe_add(x,y){var lsw=(x&65535)+(y&65535),msw=(x>>16)+(y>>16)+(lsw>>16);return msw<<16|lsw&65535}function bit_rol(num,cnt){return num<<cnt|num>>>32-cnt}function md5_cmn(q,a,b,x,s,t){return safe_add(bit_rol(safe_add(safe_add(a,q),safe_add(x,t)),s),b)}function md5_ff(a,b,c,d,x,s,t){return md5_cmn(b&c|~b&d,a,b,x,s,t)}function md5_gg(a,b,c,d,x,s,t){return md5_cmn(b&d|c&~d,a,b,x,s,t)}function md5_hh(a,b,c,d,x,s,t){return md5_cmn(b^c^d,a,b,x,s,t)}function md5_ii(a,b,c,d,x,s,t){return md5_cmn(c^(b|~d),a,b,x,s,t)}function binl_md5(x,len){x[len>>5]|=128<<len%32;x[(len+64>>>9<<4)+14]=len;var i,olda,oldb,oldc,oldd,a=1732584193,b=-271733879,c=-1732584194,d=271733878;for(i=0;i<x.length;i+=16){olda=a;oldb=b;oldc=c;oldd=d;a=md5_ff(a,b,c,d,x[i],7,-680876936);d=md5_ff(d,a,b,c,x[i+1],12,-389564586);c=md5_ff(c,d,a,b,x[i+2],17,606105819);b=md5_ff(b,c,d,a,x[i+3],22,-1044525330);a=md5_ff(a,b,c,d,x[i+4],7,-176418897);d=md5_ff(d,a,b,c,x[i+5],12,1200080426);c=md5_ff(c,d,a,b,x[i+6],17,-1473231341);b=md5_ff(b,c,d,a,x[i+7],22,-45705983);a=md5_ff(a,b,c,d,x[i+8],7,1770035416);d=md5_ff(d,a,b,c,x[i+9],12,-1958414417);c=md5_ff(c,d,a,b,x[i+10],17,-42063);b=md5_ff(b,c,d,a,x[i+11],22,-1990404162);a=md5_ff(a,b,c,d,x[i+12],7,1804603682);d=md5_ff(d,a,b,c,x[i+13],12,-40341101);c=md5_ff(c,d,a,b,x[i+14],17,-1502002290);b=md5_ff(b,c,d,a,x[i+15],22,1236535329);a=md5_gg(a,b,c,d,x[i+1],5,-165796510);d=md5_gg(d,a,b,c,x[i+6],9,-1069501632);c=md5_gg(c,d,a,b,x[i+11],14,643717713);b=md5_gg(b,c,d,a,x[i],20,-373897302);a=md5_gg(a,b,c,d,x[i+5],5,-701558691);d=md5_gg(d,a,b,c,x[i+10],9,38016083);c=md5_gg(c,d,a,b,x[i+15],14,-660478335);b=md5_gg(b,c,d,a,x[i+4],20,-405537848);a=md5_gg(a,b,c,d,x[i+9],5,568446438);d=md5_gg(d,a,b,c,x[i+14],9,-1019803690);c=md5_gg(c,d,a,b,x[i+3],14,-187363961);b=md5_gg(b,c,d,a,x[i+8],20,1163531501);a=md5_gg(a,b,c,d,x[i+13],5,-1444681467);d=md5_gg(d,a,b,c,x[i+2],9,-51403784);c=md5_gg(c,d,a,b,x[i+7],14,1735328473);b=md5_gg(b,c,d,a,x[i+12],20,-1926607734);a=md5_hh(a,b,c,d,x[i+5],4,-378558);d=md5_hh(d,a,b,c,x[i+8],11,-2022574463);c=md5_hh(c,d,a,b,x[i+11],16,1839030562);b=md5_hh(b,c,d,a,x[i+14],23,-35309556);a=md5_hh(a,b,c,d,x[i+1],4,-1530992060);d=md5_hh(d,a,b,c,x[i+4],11,1272893353);c=md5_hh(c,d,a,b,x[i+7],16,-155497632);b=md5_hh(b,c,d,a,x[i+10],23,-1094730640);a=md5_hh(a,b,c,d,x[i+13],4,681279174);d=md5_hh(d,a,b,c,x[i],11,-358537222);c=md5_hh(c,d,a,b,x[i+3],16,-722521979);b=md5_hh(b,c,d,a,x[i+6],23,76029189);a=md5_hh(a,b,c,d,x[i+9],4,-640364487);d=md5_hh(d,a,b,c,x[i+12],11,-421815835);c=md5_hh(c,d,a,b,x[i+15],16,530742520);b=md5_hh(b,c,d,a,x[i+2],23,-995338651);a=md5_ii(a,b,c,d,x[i],6,-198630844);d=md5_ii(d,a,b,c,x[i+7],10,1126891415);c=md5_ii(c,d,a,b,x[i+14],15,-1416354905);b=md5_ii(b,c,d,a,x[i+5],21,-57434055);a=md5_ii(a,b,c,d,x[i+12],6,1700485571);d=md5_ii(d,a,b,c,x[i+3],10,-1894986606);c=md5_ii(c,d,a,b,x[i+10],15,-1051523);b=md5_ii(b,c,d,a,x[i+1],21,-2054922799);a=md5_ii(a,b,c,d,x[i+8],6,1873313359);d=md5_ii(d,a,b,c,x[i+15],10,-30611744);c=md5_ii(c,d,a,b,x[i+6],15,-1560198380);b=md5_ii(b,c,d,a,x[i+13],21,1309151649);a=md5_ii(a,b,c,d,x[i+4],6,-145523070);d=md5_ii(d,a,b,c,x[i+11],10,-1120210379);c=md5_ii(c,d,a,b,x[i+2],15,718787259);b=md5_ii(b,c,d,a,x[i+9],21,-343485551);a=safe_add(a,olda);b=safe_add(b,oldb);c=safe_add(c,oldc);d=safe_add(d,oldd)}return[a,b,c,d]}function binl2rstr(input){var i,output="";for(i=0;i<input.length*32;i+=8){output+=String.fromCharCode(input[i>>5]>>>i%32&255)}return output}function rstr2binl(input){var i,output=[];output[(input.length>>2)-1]=undefined;for(i=0;i<output.length;i+=1){output[i]=0}for(i=0;i<input.length*8;i+=8){output[i>>5]|=(input.charCodeAt(i/8)&255)<<i%32}return output}function rstr_md5(s){return binl2rstr(binl_md5(rstr2binl(s),s.length*8))}function rstr_hmac_md5(key,data){var i,bkey=rstr2binl(key),ipad=[],opad=[],hash;ipad[15]=opad[15]=undefined;if(bkey.length>16){bkey=binl_md5(bkey,key.length*8)}for(i=0;i<16;i+=1){ipad[i]=bkey[i]^909522486;opad[i]=bkey[i]^1549556828}hash=binl_md5(ipad.concat(rstr2binl(data)),512+data.length*8);return binl2rstr(binl_md5(opad.concat(hash),512+128))}function rstr2hex(input){var hex_tab="0123456789abcdef",output="",x,i;for(i=0;i<input.length;i+=1){x=input.charCodeAt(i);output+=hex_tab.charAt(x>>>4&15)+hex_tab.charAt(x&15)}return output}function str2rstr_utf8(input){return unescape(encodeURIComponent(input))}function raw_md5(s){return rstr_md5(str2rstr_utf8(s))}function hex_md5(s){return rstr2hex(raw_md5(s))}function raw_hmac_md5(k,d){return rstr_hmac_md5(str2rstr_utf8(k),str2rstr_utf8(d))}function hex_hmac_md5(k,d){return rstr2hex(raw_hmac_md5(k,d))}function md5(string,key,raw){if(!key){if(!raw){return hex_md5(string)}return raw_md5(string)}if(!raw){return hex_hmac_md5(key,string)}return raw_hmac_md5(key,string)}if(typeof exports!=="undefined"){if(typeof module!=="undefined"&&module.exports){exports=module.exports=md5}exports.md5=md5}else{if(typeof define==="function"&&define.amd){define(function(){return md5})}else{$.md5=md5}}})(this)},{}],8:[function(require,module,exports){var has=Object.prototype.hasOwnProperty;exports.keys=Object.keys||function(obj){var keys=[];for(var key in obj){if(has.call(obj,key)){keys.push(key)}}return keys};exports.values=function(obj){var vals=[];for(var key in obj){if(has.call(obj,key)){vals.push(obj[key])}}return vals};exports.merge=function(a,b){for(var key in b){if(has.call(b,key)){a[key]=b[key]}}return a};exports.length=function(obj){return exports.keys(obj).length};exports.isEmpty=function(obj){return 0==exports.length(obj)}},{}],9:[function(require,module,exports){var querystring=require("querystring");var Request=function(url,data){this.url=url;this.data=data||{}};Request.prototype.send=function(callback){var isIE=window.XDomainRequest?true:false;if(isIE){var xdr=new window.XDomainRequest;xdr.open("POST",this.url,true);xdr.onload=function(){callback(xdr.responseText)};xdr.send(querystring.stringify(this.data))}else{var xhr=new XMLHttpRequest;xhr.open("POST",this.url,true);xhr.onreadystatechange=function(){if(xhr.readyState===4){callback(xhr.status,xhr.responseText)}};xhr.setRequestHeader("Content-Type","application/x-www-form-urlencoded; charset=UTF-8");xhr.send(querystring.stringify(this.data))}};module.exports=Request},{querystring:18}],18:[function(require,module,exports){var encode=encodeURIComponent;var decode=decodeURIComponent;var trim=require("trim");var type=require("type");exports.parse=function(str){if("string"!=typeof str)return{};str=trim(str);if(""==str)return{};if("?"==str.charAt(0))str=str.slice(1);var obj={};var pairs=str.split("&");for(var i=0;i<pairs.length;i++){var parts=pairs[i].split("=");var key=decode(parts[0]);var m;if(m=/(\w+)\[(\d+)\]/.exec(key)){obj[m[1]]=obj[m[1]]||[];obj[m[1]][m[2]]=decode(parts[1]);continue}obj[parts[0]]=null==parts[1]?"":decode(parts[1])}return obj};exports.stringify=function(obj){if(!obj)return"";var pairs=[];for(var key in obj){var value=obj[key];if("array"==type(value)){for(var i=0;i<value.length;++i){pairs.push(encode(key+"["+i+"]")+"="+encode(value[i]))}continue}pairs.push(encode(key)+"="+encode(obj[key]))}return pairs.join("&")}},{trim:19,type:20}],19:[function(require,module,exports){exports=module.exports=trim;function trim(str){if(str.trim)return str.trim();return str.replace(/^\s*|\s*$/g,"")}exports.left=function(str){if(str.trimLeft)return str.trimLeft();return str.replace(/^\s*/,"")};exports.right=function(str){if(str.trimRight)return str.trimRight();return str.replace(/\s*$/,"")}},{}],20:[function(require,module,exports){var toString=Object.prototype.toString;module.exports=function(val){switch(toString.call(val)){case"[object Date]":return"date";case"[object RegExp]":return"regexp";case"[object Arguments]":return"arguments";case"[object Array]":return"array";case"[object Error]":return"error"}if(val===null)return"null";if(val===undefined)return"undefined";if(val!==val)return"nan";if(val&&val.nodeType===1)return"element";val=val.valueOf?val.valueOf():Object.prototype.valueOf.apply(val);return typeof val}},{}],10:[function(require,module,exports){(function(window,undefined){"use strict";var LIBVERSION="0.7.7",EMPTY="",UNKNOWN="?",FUNC_TYPE="function",UNDEF_TYPE="undefined",OBJ_TYPE="object",STR_TYPE="string",MAJOR="major",MODEL="model",NAME="name",TYPE="type",VENDOR="vendor",VERSION="version",ARCHITECTURE="architecture",CONSOLE="console",MOBILE="mobile",TABLET="tablet",SMARTTV="smarttv",WEARABLE="wearable",EMBEDDED="embedded";var util={extend:function(regexes,extensions){for(var i in extensions){if("browser cpu device engine os".indexOf(i)!==-1&&extensions[i].length%2===0){regexes[i]=extensions[i].concat(regexes[i])}}return regexes},has:function(str1,str2){if(typeof str1==="string"){return str2.toLowerCase().indexOf(str1.toLowerCase())!==-1}else{return false}},lowerize:function(str){return str.toLowerCase()},major:function(version){return typeof version===STR_TYPE?version.split(".")[0]:undefined}};var mapper={rgx:function(){var result,i=0,j,k,p,q,matches,match,args=arguments;while(i<args.length&&!matches){var regex=args[i],props=args[i+1];if(typeof result===UNDEF_TYPE){result={};for(p in props){q=props[p];if(typeof q===OBJ_TYPE){result[q[0]]=undefined}else{result[q]=undefined}}}j=k=0;while(j<regex.length&&!matches){matches=regex[j++].exec(this.getUA());if(!!matches){for(p=0;p<props.length;p++){match=matches[++k];q=props[p];if(typeof q===OBJ_TYPE&&q.length>0){if(q.length==2){if(typeof q[1]==FUNC_TYPE){result[q[0]]=q[1].call(this,match)}else{result[q[0]]=q[1]}}else if(q.length==3){if(typeof q[1]===FUNC_TYPE&&!(q[1].exec&&q[1].test)){result[q[0]]=match?q[1].call(this,match,q[2]):undefined}else{result[q[0]]=match?match.replace(q[1],q[2]):undefined}}else if(q.length==4){result[q[0]]=match?q[3].call(this,match.replace(q[1],q[2])):undefined}}else{result[q]=match?match:undefined}}}}i+=2}return result},str:function(str,map){for(var i in map){if(typeof map[i]===OBJ_TYPE&&map[i].length>0){
 for(var j=0;j<map[i].length;j++){if(util.has(map[i][j],str)){return i===UNKNOWN?undefined:i}}}else if(util.has(map[i],str)){return i===UNKNOWN?undefined:i}}return str}};var maps={browser:{oldsafari:{version:{"1.0":"/8",1.2:"/1",1.3:"/3","2.0":"/412","2.0.2":"/416","2.0.3":"/417","2.0.4":"/419","?":"/"}},name:{"Opera Mobile":"Opera Mobi","IE Mobile":"IEMobile"}},device:{amazon:{model:{"Fire Phone":["SD","KF"]}},sprint:{model:{"Evo Shift 4G":"7373KT"},vendor:{HTC:"APA",Sprint:"Sprint"}}},os:{windows:{version:{ME:"4.90","NT 3.11":"NT3.51","NT 4.0":"NT4.0",2000:"NT 5.0",XP:["NT 5.1","NT 5.2"],Vista:"NT 6.0",7:"NT 6.1",8:"NT 6.2",8.1:"NT 6.3",10:["NT 6.4","NT 10.0"],RT:"ARM"},name:{"Windows Phone":"Windows Phone OS"}}}};var regexes={browser:[[/(opera\smini)\/([\w\.-]+)/i,/(opera\s[mobiletab]+).+version\/([\w\.-]+)/i,/(opera).+version\/([\w\.]+)/i,/(opera)[\/\s]+([\w\.]+)/i],[[NAME,mapper.str,maps.browser.name],VERSION],[/\s(opr)\/([\w\.]+)/i],[[NAME,"Opera"],VERSION],[/(kindle)\/([\w\.]+)/i,/(lunascape|maxthon|netfront|jasmine|blazer)[\/\s]?([\w\.]+)*/i,/(avant\s|iemobile|slim|baidu)(?:browser)?[\/\s]?([\w\.]*)/i,/(?:ms|\()(ie)\s([\w\.]+)/i,/(rekonq)\/([\w\.]+)*/i,/(chromium|flock|rockmelt|midori|epiphany|silk|skyfire|ovibrowser|bolt|iron|vivaldi)\/([\w\.-]+)/i],[[NAME,mapper.str,maps.browser.name],VERSION],[/(trident).+rv[:\s]([\w\.]+).+like\sgecko/i,/(Edge)\/((\d+)?[\w\.]+)/i],[[NAME,"IE"],VERSION],[/(yabrowser)\/([\w\.]+)/i],[[NAME,"Yandex"],VERSION],[/(comodo_dragon)\/([\w\.]+)/i],[[NAME,/_/g," "],VERSION],[/((?:android.+)crmo|crios)\/([\w\.]+)/i,/android.+chrome\/([\w\.]+)\s+(?:mobile\s?safari)/i],[[NAME,"Chrome Mobile"],VERSION],[/(chrome|omniweb|arora|[tizenoka]{5}\s?browser)\/v?([\w\.]+)/i,/(uc\s?browser|qqbrowser)[\/\s]?([\w\.]+)/i],[NAME,VERSION],[/(dolfin)\/([\w\.]+)/i],[[NAME,"Dolphin"],VERSION],[/XiaoMi\/MiuiBrowser\/([\w\.]+)/i],[VERSION,[NAME,"MIUI Browser"]],[/android.+version\/([\w\.]+)\s+(?:mobile\s?safari|safari)/i],[VERSION,[NAME,"Android Browser"]],[/FBAV\/([\w\.]+);/i],[VERSION,[NAME,"Facebook"]],[/version\/([\w\.]+).+?mobile\/\w+\s(safari)/i],[VERSION,[NAME,"Mobile Safari"]],[/version\/([\w\.]+).+?(mobile\s?safari|safari)/i],[VERSION,NAME],[/webkit.+?(mobile\s?safari|safari)(\/[\w\.]+)/i],[NAME,[VERSION,mapper.str,maps.browser.oldsafari.version]],[/(konqueror)\/([\w\.]+)/i,/(webkit|khtml)\/([\w\.]+)/i],[NAME,VERSION],[/(blackberry)\\s?\/([\w\.]+)/i],[[NAME,"BlackBerry"],VERSION],[/(navigator|netscape)\/([\w\.-]+)/i],[[NAME,"Netscape"],VERSION],[/(swiftfox)/i,/(icedragon|iceweasel|camino|chimera|fennec|maemo\sbrowser|minimo|conkeror)[\/\s]?([\w\.\+]+)/i,/(firefox|seamonkey|k-meleon|icecat|iceape|firebird|phoenix)\/([\w\.-]+)/i,/(mozilla)\/([\w\.]+).+rv\:.+gecko\/\d+/i,/(polaris|lynx|dillo|icab|doris|amaya|w3m|netsurf)[\/\s]?([\w\.]+)/i,/(links)\s\(([\w\.]+)/i,/(gobrowser)\/?([\w\.]+)*/i,/(ice\s?browser)\/v?([\w\._]+)/i,/(mosaic)[\/\s]([\w\.]+)/i],[NAME,VERSION]],cpu:[[/(?:(amd|x(?:(?:86|64)[_-])?|wow|win)64)[;\)]/i],[[ARCHITECTURE,"amd64"]],[/(ia32(?=;))/i],[[ARCHITECTURE,util.lowerize]],[/((?:i[346]|x)86)[;\)]/i],[[ARCHITECTURE,"ia32"]],[/windows\s(ce|mobile);\sppc;/i],[[ARCHITECTURE,"arm"]],[/((?:ppc|powerpc)(?:64)?)(?:\smac|;|\))/i],[[ARCHITECTURE,/ower/,"",util.lowerize]],[/(sun4\w)[;\)]/i],[[ARCHITECTURE,"sparc"]],[/((?:avr32|ia64(?=;))|68k(?=\))|arm(?:64|(?=v\d+;))|(?=atmel\s)avr|(?:irix|mips|sparc)(?:64)?(?=;)|pa-risc)/i],[[ARCHITECTURE,util.lowerize]]],device:[[/\((ipad|playbook);[\w\s\);-]+(rim|apple)/i],[MODEL,VENDOR,[TYPE,TABLET]],[/applecoremedia\/[\w\.]+ \((ipad)/],[MODEL,[VENDOR,"Apple"],[TYPE,TABLET]],[/(apple\s{0,1}tv)/i],[[MODEL,"Apple TV"],[VENDOR,"Apple"]],[/(archos)\s(gamepad2?)/i,/(hp).+(touchpad)/i,/(kindle)\/([\w\.]+)/i,/\s(nook)[\w\s]+build\/(\w+)/i,/(dell)\s(strea[kpr\s\d]*[\dko])/i],[VENDOR,MODEL,[TYPE,TABLET]],[/(kf[A-z]+)\sbuild\/[\w\.]+.*silk\//i],[MODEL,[VENDOR,"Amazon"],[TYPE,TABLET]],[/(sd|kf)[0349hijorstuw]+\sbuild\/[\w\.]+.*silk\//i],[[MODEL,mapper.str,maps.device.amazon.model],[VENDOR,"Amazon"],[TYPE,MOBILE]],[/\((ip[honed|\s\w*]+);.+(apple)/i],[MODEL,VENDOR,[TYPE,MOBILE]],[/\((ip[honed|\s\w*]+);/i],[MODEL,[VENDOR,"Apple"],[TYPE,MOBILE]],[/(blackberry)[\s-]?(\w+)/i,/(blackberry|benq|palm(?=\-)|sonyericsson|acer|asus|dell|huawei|meizu|motorola|polytron)[\s_-]?([\w-]+)*/i,/(hp)\s([\w\s]+\w)/i,/(asus)-?(\w+)/i],[VENDOR,MODEL,[TYPE,MOBILE]],[/\(bb10;\s(\w+)/i],[MODEL,[VENDOR,"BlackBerry"],[TYPE,MOBILE]],[/android.+(transfo[prime\s]{4,10}\s\w+|eeepc|slider\s\w+|nexus 7)/i],[MODEL,[VENDOR,"Asus"],[TYPE,TABLET]],[/(sony)\s(tablet\s[ps])\sbuild\//i,/(sony)?(?:sgp.+)\sbuild\//i],[[VENDOR,"Sony"],[MODEL,"Xperia Tablet"],[TYPE,TABLET]],[/(?:sony)?(?:(?:(?:c|d)\d{4})|(?:so[-l].+))\sbuild\//i],[[VENDOR,"Sony"],[MODEL,"Xperia Phone"],[TYPE,MOBILE]],[/\s(ouya)\s/i,/(nintendo)\s([wids3u]+)/i],[VENDOR,MODEL,[TYPE,CONSOLE]],[/android.+;\s(shield)\sbuild/i],[MODEL,[VENDOR,"Nvidia"],[TYPE,CONSOLE]],[/(playstation\s[3portablevi]+)/i],[MODEL,[VENDOR,"Sony"],[TYPE,CONSOLE]],[/(sprint\s(\w+))/i],[[VENDOR,mapper.str,maps.device.sprint.vendor],[MODEL,mapper.str,maps.device.sprint.model],[TYPE,MOBILE]],[/(lenovo)\s?(S(?:5000|6000)+(?:[-][\w+]))/i],[VENDOR,MODEL,[TYPE,TABLET]],[/(htc)[;_\s-]+([\w\s]+(?=\))|\w+)*/i,/(zte)-(\w+)*/i,/(alcatel|geeksphone|huawei|lenovo|nexian|panasonic|(?=;\s)sony)[_\s-]?([\w-]+)*/i],[VENDOR,[MODEL,/_/g," "],[TYPE,MOBILE]],[/(nexus\s9)/i],[MODEL,[VENDOR,"HTC"],[TYPE,TABLET]],[/[\s\(;](xbox(?:\sone)?)[\s\);]/i],[MODEL,[VENDOR,"Microsoft"],[TYPE,CONSOLE]],[/(kin\.[onetw]{3})/i],[[MODEL,/\./g," "],[VENDOR,"Microsoft"],[TYPE,MOBILE]],[/\s(milestone|droid(?:[2-4x]|\s(?:bionic|x2|pro|razr))?(:?\s4g)?)[\w\s]+build\//i,/mot[\s-]?(\w+)*/i,/(XT\d{3,4}) build\//i],[MODEL,[VENDOR,"Motorola"],[TYPE,MOBILE]],[/android.+\s(mz60\d|xoom[\s2]{0,2})\sbuild\//i],[MODEL,[VENDOR,"Motorola"],[TYPE,TABLET]],[/android.+((sch-i[89]0\d|shw-m380s|gt-p\d{4}|gt-n8000|sgh-t8[56]9|nexus 10))/i,/((SM-T\w+))/i],[[VENDOR,"Samsung"],MODEL,[TYPE,TABLET]],[/((s[cgp]h-\w+|gt-\w+|galaxy\snexus|sm-n900))/i,/(sam[sung]*)[\s-]*(\w+-?[\w-]*)*/i,/sec-((sgh\w+))/i],[[VENDOR,"Samsung"],MODEL,[TYPE,MOBILE]],[/(samsung);smarttv/i],[VENDOR,MODEL,[TYPE,SMARTTV]],[/\(dtv[\);].+(aquos)/i],[MODEL,[VENDOR,"Sharp"],[TYPE,SMARTTV]],[/sie-(\w+)*/i],[MODEL,[VENDOR,"Siemens"],[TYPE,MOBILE]],[/(maemo|nokia).*(n900|lumia\s\d+)/i,/(nokia)[\s_-]?([\w-]+)*/i],[[VENDOR,"Nokia"],MODEL,[TYPE,MOBILE]],[/android\s3\.[\s\w;-]{10}(a\d{3})/i],[MODEL,[VENDOR,"Acer"],[TYPE,TABLET]],[/android\s3\.[\s\w;-]{10}(lg?)-([06cv9]{3,4})/i],[[VENDOR,"LG"],MODEL,[TYPE,TABLET]],[/(lg) netcast\.tv/i],[VENDOR,MODEL,[TYPE,SMARTTV]],[/(nexus\s[45])/i,/lg[e;\s\/-]+(\w+)*/i],[MODEL,[VENDOR,"LG"],[TYPE,MOBILE]],[/android.+(ideatab[a-z0-9\-\s]+)/i],[MODEL,[VENDOR,"Lenovo"],[TYPE,TABLET]],[/linux;.+((jolla));/i],[VENDOR,MODEL,[TYPE,MOBILE]],[/((pebble))app\/[\d\.]+\s/i],[VENDOR,MODEL,[TYPE,WEARABLE]],[/android.+;\s(glass)\s\d/i],[MODEL,[VENDOR,"Google"],[TYPE,WEARABLE]],[/android.+(\w+)\s+build\/hm\1/i,/android.+(hm[\s\-_]*note?[\s_]*(?:\d\w)?)\s+build/i,/android.+(mi[\s\-_]*(?:one|one[\s_]plus)?[\s_]*(?:\d\w)?)\s+build/i],[[MODEL,/_/g," "],[VENDOR,"Xiaomi"],[TYPE,MOBILE]],[/(mobile|tablet);.+rv\:.+gecko\//i],[[TYPE,util.lowerize],VENDOR,MODEL]],engine:[[/(presto)\/([\w\.]+)/i,/(webkit|trident|netfront|netsurf|amaya|lynx|w3m)\/([\w\.]+)/i,/(khtml|tasman|links)[\/\s]\(?([\w\.]+)/i,/(icab)[\/\s]([23]\.[\d\.]+)/i],[NAME,VERSION],[/rv\:([\w\.]+).*(gecko)/i],[VERSION,NAME]],os:[[/microsoft\s(windows)\s(vista|xp)/i],[NAME,VERSION],[/(windows)\snt\s6\.2;\s(arm)/i,/(windows\sphone(?:\sos)*|windows\smobile|windows)[\s\/]?([ntce\d\.\s]+\w)/i],[[NAME,mapper.str,maps.os.windows.name],[VERSION,mapper.str,maps.os.windows.version]],[/(win(?=3|9|n)|win\s9x\s)([nt\d\.]+)/i],[[NAME,"Windows"],[VERSION,mapper.str,maps.os.windows.version]],[/\((bb)(10);/i],[[NAME,"BlackBerry"],VERSION],[/(blackberry)\w*\/?([\w\.]+)*/i,/(tizen)[\/\s]([\w\.]+)/i,/(android|webos|palm\os|qnx|bada|rim\stablet\sos|meego|contiki)[\/\s-]?([\w\.]+)*/i,/linux;.+(sailfish);/i],[NAME,VERSION],[/(symbian\s?o?s?|symbos|s60(?=;))[\/\s-]?([\w\.]+)*/i],[[NAME,"Symbian"],VERSION],[/\((series40);/i],[NAME],[/mozilla.+\(mobile;.+gecko.+firefox/i],[[NAME,"Firefox OS"],VERSION],[/(nintendo|playstation)\s([wids3portablevu]+)/i,/(mint)[\/\s\(]?(\w+)*/i,/(mageia|vectorlinux)[;\s]/i,/(joli|[kxln]?ubuntu|debian|[open]*suse|gentoo|arch|slackware|fedora|mandriva|centos|pclinuxos|redhat|zenwalk|linpus)[\/\s-]?([\w\.-]+)*/i,/(hurd|linux)\s?([\w\.]+)*/i,/(gnu)\s?([\w\.]+)*/i],[[NAME,"Linux"],VERSION],[/(cros)\s[\w]+\s([\w\.]+\w)/i],[[NAME,"Chromium OS"],VERSION],[/(sunos)\s?([\w\.]+\d)*/i],[[NAME,"Solaris"],VERSION],[/\s([frentopc-]{0,4}bsd|dragonfly)\s?([\w\.]+)*/i],[[NAME,"Linux"],VERSION],[/(iphone)(?:.*os\s*([\w]+)*\slike\smac|;\sopera)/i],[[NAME,"iPhone"],[VERSION,/_/g,"."]],[/(ipad)(?:.*os\s*([\w]+)*\slike\smac|;\sopera)/i],[[NAME,"iPad"],[VERSION,/_/g,"."]],[/(mac\sos\sx)\s?([\w\s\.]+\w)*/i,/(macintosh|mac(?=_powerpc)\s)/i],[[NAME,"Mac"],[VERSION,/_/g,"."]],[/((?:open)?solaris)[\/\s-]?([\w\.]+)*/i,/(haiku)\s(\w+)/i,/(aix)\s((\d)(?=\.|\)|\s)[\w\.]*)*/i,/(plan\s9|minix|beos|os\/2|amigaos|morphos|risc\sos|openvms)/i,/(unix)\s?([\w\.]+)*/i],[NAME,VERSION]]};var UAParser=function(uastring,extensions){if(!(this instanceof UAParser)){return new UAParser(uastring,extensions).getResult()}var ua=uastring||(window&&window.navigator&&window.navigator.userAgent?window.navigator.userAgent:EMPTY);var rgxmap=extensions?util.extend(regexes,extensions):regexes;this.getBrowser=function(){var browser=mapper.rgx.apply(this,rgxmap.browser);browser.major=util.major(browser.version);return browser};this.getCPU=function(){return mapper.rgx.apply(this,rgxmap.cpu)};this.getDevice=function(){return mapper.rgx.apply(this,rgxmap.device)};this.getEngine=function(){return mapper.rgx.apply(this,rgxmap.engine)};this.getOS=function(){return mapper.rgx.apply(this,rgxmap.os)};this.getResult=function(){return{ua:this.getUA(),browser:this.getBrowser(),engine:this.getEngine(),os:this.getOS(),device:this.getDevice(),cpu:this.getCPU()}};this.getUA=function(){return ua};this.setUA=function(uastring){ua=uastring;return this};this.setUA(ua);return this};UAParser.VERSION=LIBVERSION;UAParser.BROWSER={NAME:NAME,MAJOR:MAJOR,VERSION:VERSION};UAParser.CPU={ARCHITECTURE:ARCHITECTURE};UAParser.DEVICE={MODEL:MODEL,VENDOR:VENDOR,TYPE:TYPE,CONSOLE:CONSOLE,MOBILE:MOBILE,SMARTTV:SMARTTV,TABLET:TABLET,WEARABLE:WEARABLE,EMBEDDED:EMBEDDED};UAParser.ENGINE={NAME:NAME,VERSION:VERSION};UAParser.OS={NAME:NAME,VERSION:VERSION};if(typeof exports!==UNDEF_TYPE){if(typeof module!==UNDEF_TYPE&&module.exports){exports=module.exports=UAParser}exports.UAParser=UAParser}else{if(typeof define===FUNC_TYPE&&define.amd){define(function(){return UAParser})}else{window.UAParser=UAParser}}var $=window.jQuery||window.Zepto;if(typeof $!==UNDEF_TYPE){var parser=new UAParser;$.ua=parser.getResult();$.ua.get=function(){return parser.getUA()};$.ua.set=function(uastring){parser.setUA(uastring);var result=parser.getResult();for(var prop in result){$.ua[prop]=result[prop]}}}})(this)},{}],11:[function(require,module,exports){var uuid=function(a){return a?(a^Math.random()*16>>a/4).toString(16):([1e7]+-1e3+-4e3+-8e3+-1e11).replace(/[018]/g,uuid)};module.exports=uuid},{}],12:[function(require,module,exports){module.exports="2.2.1"},{}]},{},{1:""}));
\ No newline at end of file
diff --git a/src/amplitude.js b/src/amplitude.js
index 2541f7bc..4c10ed80 100644
--- a/src/amplitude.js
+++ b/src/amplitude.js
@@ -318,7 +318,7 @@ Amplitude.prototype._logEvent = function(eventType, eventProperties, apiProperti
     object.merge(userProperties, this._utmProperties);
 
     // Add referral info onto the user properties
-    if (this.options.includeReferrer && this._getReferrer()) {
+    if (this.options.includeReferrer) {
       object.merge(userProperties, {
         'referrer': this._getReferrer(),
         'referring_domain': this._getReferringDomain()