diff --git a/amplitude.js b/amplitude.js
index 425b4aa4..776fc5da 100644
--- a/amplitude.js
+++ b/amplitude.js
@@ -324,15 +324,13 @@ Amplitude.prototype.logEvent = function(eventType, eventProperties) {
   try {
     var eventTime = new Date().getTime();
     var eventId = this.nextEventId();
-    var sessionId = this._sessionId;
-    var lastEventTime = this._lastEventTime;
     var ua = this._ua;
-    if (!sessionId || !lastEventTime || eventTime - lastEventTime > this.options.sessionTimeout) {
-      sessionId = eventTime;
-      localStorage.setItem(LocalStorageKeys.SESSION_ID, sessionId);
+    if (!this._sessionId || !this._lastEventTime || eventTime - this._lastEventTime > this.options.sessionTimeout) {
+      this._sessionId = eventTime;
+      localStorage.setItem(LocalStorageKeys.SESSION_ID, this._sessionId);
     }
-    lastEventTime = eventTime;
-    localStorage.setItem(LocalStorageKeys.LAST_EVENT_TIME, lastEventTime);
+    this._lastEventTime = eventTime;
+    localStorage.setItem(LocalStorageKeys.LAST_EVENT_TIME, this._lastEventTime);
     localStorage.setItem(LocalStorageKeys.LAST_EVENT_ID, eventId);
 
     eventProperties = eventProperties || {};
@@ -341,7 +339,7 @@ Amplitude.prototype.logEvent = function(eventType, eventProperties) {
       user_id: this.options.userId || this.options.deviceId,
       timestamp: eventTime,
       event_id: eventId,
-      session_id: sessionId || -1,
+      session_id: this._sessionId || -1,
       event_type: eventType,
       version_name: this.options.versionName || null,
       platform: this.options.platform,
diff --git a/amplitude.min.js b/amplitude.min.js
index 765daf21..44e324d5 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 Base64=require("./base64");var Cookie=require("./cookie");var JSON=require("json");var Request=require("./xhr");var UTF8=require("./utf8");var UUID=require("./uuid");var md5=require("./md5");var localStorage=require("./localstorage");var detect=require("./detect");var version=require("./version");var object=require("object");var log=function(s){console.log("[Amplitude] "+s)};var API_VERSION=2;var DEFAULT_OPTIONS={apiEndpoint:"api.amplitude.com",cookieName:"amplitude_id",cookieExpiration:365*10,unsentKey:"amplitude_unsent",saveEvents:true,domain:undefined,sessionTimeout:30*60*1e3,platform:"Web"};var LocalStorageKeys={LAST_EVENT_ID:"amplitude_lastEventId",LAST_EVENT_TIME:"amplitude_lastEventTime",SESSION_ID:"amplitude_sessionId"};var Amplitude=function(){this._unsentEvents=[];this._ua=detect.parse(navigator.userAgent);this.options=object.merge({},DEFAULT_OPTIONS)};Amplitude.prototype._eventId=0;Amplitude.prototype._sending=false;Amplitude.prototype._lastEventTime=null;Amplitude.prototype._sessionId=null;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}this.options.platform=opt_config.platform||this.options.platform;this.options.sessionTimeout=opt_config.sessionTimeout||this.options.sessionTimeout}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()}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._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.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}}};var _saveCookieData=function(scope){Cookie.set(scope.options.cookieName,{deviceId:scope.options.deviceId,userId:scope.options.userId,globalUserProperties:scope.options.userProperties})};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.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){if(!eventType){return}try{var eventTime=(new Date).getTime();var eventId=this.nextEventId();var sessionId=this._sessionId;var lastEventTime=this._lastEventTime;var ua=this._ua;if(!sessionId||!lastEventTime||eventTime-lastEventTime>this.options.sessionTimeout){sessionId=eventTime;localStorage.setItem(LocalStorageKeys.SESSION_ID,sessionId)}lastEventTime=eventTime;localStorage.setItem(LocalStorageKeys.LAST_EVENT_TIME,lastEventTime);localStorage.setItem(LocalStorageKeys.LAST_EVENT_ID,eventId);eventProperties=eventProperties||{};var event={device_id:this.options.deviceId,user_id:this.options.userId||this.options.deviceId,timestamp:eventTime,event_id:eventId,session_id:sessionId||-1,event_type:eventType,version_name:this.options.versionName||null,platform:this.options.platform,os_name:ua.browser.family,os_version:ua.browser.version,device_model:ua.os.family,event_properties:eventProperties,user_properties:this.options.userProperties||{},uuid:UUID(),library:{name:"amplitude-js",version:this.__VERSION__}};this._unsentEvents.push(event);if(this.options.saveEvents){this.saveEvents()}this.sendEvents()}catch(e){log(e)}};Amplitude.prototype.sendEvents=function(){if(!this._sending){this._sending=true;var url=("https:"==window.location.protocol?"https":"http")+"://"+this.options.apiEndpoint+"/";var events=JSON.stringify(this._unsentEvents);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 numEvents=this._unsentEvents.length;var scope=this;new Request(url,data).send(function(response){scope._sending=false;try{if(response=="success"){scope._unsentEvents.splice(0,numEvents);if(scope.options.saveEvents){scope.saveEvents()}if(scope._unsentEvents.length>0){scope.sendEvents()}}}catch(e){}})}};Amplitude.prototype.setGlobalUserProperties=Amplitude.prototype.setUserProperties;Amplitude.prototype.__VERSION__=version;module.exports=Amplitude},{"./base64":3,"./cookie":4,json:5,"./xhr":6,"./utf8":7,"./uuid":8,"./md5":9,"./localstorage":10,"./detect":11,"./version":12,object:13}],3:[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":7}],7:[function(require,module,exports){var UTF8={encode:function(s){s=s.replace(/\r\n/g,"\n");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 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":3,json:5,"top-domain":14}],5:[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":15}],15:[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:16}],16:[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}}},{}],6:[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){if(xhr.status==200){callback(xhr.responseText)}}};xhr.setRequestHeader("Content-Type","application/x-www-form-urlencoded; charset=UTF-8");xhr.send(querystring.stringify(this.data))}};module.exports=Request},{querystring:17}],17:[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:18,type:19}],18:[function(require,module,exports){exports=module.exports=trim;function trim(str){if(str.trim)return str.trim();return str.replace(/^\s*|\s*$/g,"")}exports.left=function(str){if(str.trimLeft)return str.trimLeft();return str.replace(/^\s*/,"")};exports.right=function(str){if(str.trimRight)return str.trimRight();return str.replace(/\s*$/,"")}},{}],19:[function(require,module,exports){var toString=Object.prototype.toString;module.exports=function(val){switch(toString.call(val)){case"[object Function]":return"function";case"[object Date]":return"date";case"[object RegExp]":return"regexp";case"[object Arguments]":return"arguments";case"[object Array]":return"array";case"[object String]":return"string"}if(val===null)return"null";if(val===undefined)return"undefined";if(val&&val.nodeType===1)return"element";if(val===Object(val))return"object";return typeof val}},{}],8:[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},{}],9:[function(require,module,exports){var UTF8=require("./utf8");var md5cycle=function(x,k){var a=x[0],b=x[1],c=x[2],d=x[3];a=ff(a,b,c,d,k[0],7,-680876936);d=ff(d,a,b,c,k[1],12,-389564586);c=ff(c,d,a,b,k[2],17,606105819);b=ff(b,c,d,a,k[3],22,-1044525330);a=ff(a,b,c,d,k[4],7,-176418897);d=ff(d,a,b,c,k[5],12,1200080426);c=ff(c,d,a,b,k[6],17,-1473231341);b=ff(b,c,d,a,k[7],22,-45705983);a=ff(a,b,c,d,k[8],7,1770035416);d=ff(d,a,b,c,k[9],12,-1958414417);c=ff(c,d,a,b,k[10],17,-42063);b=ff(b,c,d,a,k[11],22,-1990404162);a=ff(a,b,c,d,k[12],7,1804603682);d=ff(d,a,b,c,k[13],12,-40341101);c=ff(c,d,a,b,k[14],17,-1502002290);b=ff(b,c,d,a,k[15],22,1236535329);a=gg(a,b,c,d,k[1],5,-165796510);d=gg(d,a,b,c,k[6],9,-1069501632);c=gg(c,d,a,b,k[11],14,643717713);b=gg(b,c,d,a,k[0],20,-373897302);a=gg(a,b,c,d,k[5],5,-701558691);d=gg(d,a,b,c,k[10],9,38016083);c=gg(c,d,a,b,k[15],14,-660478335);b=gg(b,c,d,a,k[4],20,-405537848);a=gg(a,b,c,d,k[9],5,568446438);d=gg(d,a,b,c,k[14],9,-1019803690);c=gg(c,d,a,b,k[3],14,-187363961);b=gg(b,c,d,a,k[8],20,1163531501);a=gg(a,b,c,d,k[13],5,-1444681467);d=gg(d,a,b,c,k[2],9,-51403784);c=gg(c,d,a,b,k[7],14,1735328473);b=gg(b,c,d,a,k[12],20,-1926607734);a=hh(a,b,c,d,k[5],4,-378558);d=hh(d,a,b,c,k[8],11,-2022574463);c=hh(c,d,a,b,k[11],16,1839030562);b=hh(b,c,d,a,k[14],23,-35309556);a=hh(a,b,c,d,k[1],4,-1530992060);d=hh(d,a,b,c,k[4],11,1272893353);c=hh(c,d,a,b,k[7],16,-155497632);b=hh(b,c,d,a,k[10],23,-1094730640);a=hh(a,b,c,d,k[13],4,681279174);d=hh(d,a,b,c,k[0],11,-358537222);c=hh(c,d,a,b,k[3],16,-722521979);b=hh(b,c,d,a,k[6],23,76029189);a=hh(a,b,c,d,k[9],4,-640364487);d=hh(d,a,b,c,k[12],11,-421815835);c=hh(c,d,a,b,k[15],16,530742520);b=hh(b,c,d,a,k[2],23,-995338651);a=ii(a,b,c,d,k[0],6,-198630844);d=ii(d,a,b,c,k[7],10,1126891415);c=ii(c,d,a,b,k[14],15,-1416354905);b=ii(b,c,d,a,k[5],21,-57434055);a=ii(a,b,c,d,k[12],6,1700485571);d=ii(d,a,b,c,k[3],10,-1894986606);c=ii(c,d,a,b,k[10],15,-1051523);b=ii(b,c,d,a,k[1],21,-2054922799);a=ii(a,b,c,d,k[8],6,1873313359);d=ii(d,a,b,c,k[15],10,-30611744);c=ii(c,d,a,b,k[6],15,-1560198380);b=ii(b,c,d,a,k[13],21,1309151649);a=ii(a,b,c,d,k[4],6,-145523070);d=ii(d,a,b,c,k[11],10,-1120210379);c=ii(c,d,a,b,k[2],15,718787259);b=ii(b,c,d,a,k[9],21,-343485551);x[0]=add32(a,x[0]);x[1]=add32(b,x[1]);x[2]=add32(c,x[2]);x[3]=add32(d,x[3])};var cmn=function(q,a,b,x,s,t){a=add32(add32(a,q),add32(x,t));return add32(a<<s|a>>>32-s,b)};var ff=function(a,b,c,d,x,s,t){return cmn(b&c|~b&d,a,b,x,s,t)};var gg=function(a,b,c,d,x,s,t){return cmn(b&d|c&~d,a,b,x,s,t)};var hh=function(a,b,c,d,x,s,t){return cmn(b^c^d,a,b,x,s,t)};var ii=function(a,b,c,d,x,s,t){return cmn(c^(b|~d),a,b,x,s,t)};var md51=function(s){s=UTF8.encode(s);var n=s.length,state=[1732584193,-271733879,-1732584194,271733878],i;for(i=64;i<=s.length;i+=64){md5cycle(state,md5blk(s.substring(i-64,i)))}s=s.substring(i-64);var tail=[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0];for(i=0;i<s.length;i++)tail[i>>2]|=s.charCodeAt(i)<<(i%4<<3);tail[i>>2]|=128<<(i%4<<3);if(i>55){md5cycle(state,tail);for(i=0;i<16;i++)tail[i]=0}tail[14]=n*8;md5cycle(state,tail);return state};var md5blk=function(s){var md5blks=[],i;for(i=0;i<64;i+=4){md5blks[i>>2]=s.charCodeAt(i)+(s.charCodeAt(i+1)<<8)+(s.charCodeAt(i+2)<<16)+(s.charCodeAt(i+3)<<24)}return md5blks};var hex_chr="0123456789abcdef".split("");var rhex=function(n){var s="",j=0;for(;j<4;j++)s+=hex_chr[n>>j*8+4&15]+hex_chr[n>>j*8&15];return s};var hex=function(x){for(var i=0;i<x.length;i++)x[i]=rhex(x[i]);return x.join("")};var md5=function(s){return hex(md51(s))};var add32=function(a,b){return a+b&4294967295};if(md5("hello")!="5d41402abc4b2a76b9719d911017c592"){var add32=function(x,y){var lsw=(x&65535)+(y&65535),msw=(x>>16)+(y>>16)+(lsw>>16);return msw<<16|lsw&65535}}module.exports=md5},{"./utf8":7}],10:[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},{}],11:[function(require,module,exports){(function(root,undefined){if(!Array.prototype.map){Array.prototype.map=function(callback,thisArg){var T,A,k;if(this==null){throw new TypeError(" this is null or not defined")}var O=Object(this);var len=O.length>>>0;if(typeof callback!=="function"){throw new TypeError(callback+" is not a function")}if(thisArg){T=thisArg}A=new Array(len);k=0;while(k<len){var kValue,mappedValue;if(k in O){kValue=O[k];mappedValue=callback.call(T,kValue,k,O);A[k]=mappedValue}k++}return A}}var detect=root.detect=function(){var _this=function(){};var regexes={browser_parsers:[{regex:"(SeaMonkey|Camino)/(\\d+)\\.(\\d+)\\.?([ab]?\\d+[a-z]*)",family_replacement:"Camino"},{regex:"(Fennec)/(\\d+)\\.(\\d+)\\.?([ab]?\\d+[a-z]*)",family_replacement:"Firefox Mobile"},{regex:"(Fennec)/(\\d+)\\.(\\d+)(pre)",family_replacment:"Firefox Mobile"},{regex:"(Fennec)/(\\d+)\\.(\\d+)",family_replacement:"Firefox Mobile"},{regex:"Mobile.*(Firefox)/(\\d+)\\.(\\d+)",family_replacement:"Firefox"},{regex:"(Namoroka|Shiretoko|Minefield)/(\\d+)\\.(\\d+)\\.(\\d+(?:pre)?)",family_replacement:"Firefox"},{regex:"(Firefox)/(\\d+)\\.(\\d+)(a\\d+[a-z]*)",family_replacement:"Firefox"},{regex:"(Firefox)/(\\d+)\\.(\\d+)(b\\d+[a-z]*)",family_replacement:"Firefox"},{regex:"(Firefox)-(?:\\d+\\.\\d+)?/(\\d+)\\.(\\d+)(a\\d+[a-z]*)",family_replacement:"Firefox"},{regex:"(Firefox)-(?:\\d+\\.\\d+)?/(\\d+)\\.(\\d+)(b\\d+[a-z]*)",family_replacement:"Firefox"},{regex:"(Namoroka|Shiretoko|Minefield)/(\\d+)\\.(\\d+)([ab]\\d+[a-z]*)?",family_replacement:"Firefox"},{regex:"(Navigator)/(\\d+)\\.(\\d+)\\.(\\d+)",family_replacement:"Netscape"},{regex:"(Navigator)/(\\d+)\\.(\\d+)([ab]\\d+)",family_replacement:"Netscape"},{regex:"(Netscape6)/(\\d+)\\.(\\d+)\\.(\\d+)",family_replacement:"Netscape"},{regex:"(Opera Tablet).*Version/(\\d+)\\.(\\d+)(?:\\.(\\d+))?",family_replacement:"Opera Mobile",tablet:true},{regex:"(Opera)/.+Opera Mobi.+Version/(\\d+)\\.(\\d+)",family_replacement:"Opera Mobile"},{regex:"Opera Mobi",family_replacement:"Opera Mobile"},{regex:"(Opera Mini)/(\\d+)\\.(\\d+)",family_replacement:"Opera Mini"},{regex:"(Opera Mini)/att/(\\d+)\\.(\\d+)",family_replacement:"Opera Mini"},{regex:"(Opera)/9.80.*Version/(\\d+)\\.(\\d+)(?:\\.(\\d+))?",family_replacement:"Opera"},{regex:"(konqueror)/(\\d+)\\.(\\d+)\\.(\\d+)",family_replacement:"Konqueror"},{regex:"(CrMo)/(\\d+)\\.(\\d+)\\.(\\d+)\\.(\\d+)",family_replacement:"Chrome Mobile"},{regex:"(CriOS)/(\\d+)\\.(\\d+)\\.(\\d+)\\.(\\d+)",family_replacement:"Chrome Mobile"},{regex:"(Chrome)/(\\d+)\\.(\\d+)\\.(\\d+)\\.(\\d+) Mobile",family_replacement:"Chrome Mobile"},{regex:"(KDE)",family_replacement:"Konqueror"},{regex:"(OmniWeb|Camino|Chrome|Netscape|Konqueror|Opera Mini|iCab)/(\\d+)\\.(\\d+)\\.(\\d+)"},{regex:"(Camino|Chrome|Netscape|Opera Mini|Opera|Konqueror|iCab)/(\\d+)\\.(\\d+)"},{regex:"(iCab) (\\d+)\\.(\\d+)\\.(\\d+)"},{regex:"(iCab|Opera) (\\d+)\\.(\\d+)\\.?(\\d+)?"},{regex:"(IEMobile)[ /](\\d+)\\.(\\d+)",family_replacement:"IE Mobile"},{regex:"(MSIE) (\\d+)\\.(\\d+).*XBLWP7",family_replacement:"IE"},{regex:"(Firefox)/(\\d+)\\.(\\d+)\\.(\\d+)"},{regex:"(Firefox)/(\\d+)\\.(\\d+)(pre|[ab]\\d+[a-z]*)?"},{regex:"(iPod).+Version/(\\d+)\\.(\\d+)\\.(\\d+)",family_replacement:"Mobile Safari",manufacturer:"Apple"},{regex:"(iPod).*Version/(\\d+)\\.(\\d+)",family_replacement:"Mobile Safari",manufacturer:"Apple"},{regex:"(iPod)",family_replacement:"Mobile Safari",manufacturer:"Apple"},{regex:"(iPhone).*Version/(\\d+)\\.(\\d+)\\.(\\d+)",family_replacement:"Mobile Safari",manufacturer:"Apple"},{regex:"(iPhone).*Version/(\\d+)\\.(\\d+)",family_replacement:"Mobile Safari",manufacturer:"Apple"},{regex:"(iPhone)",family_replacement:"Mobile Safari",manufacturer:"Apple"},{regex:"(iPad).*Version/(\\d+)\\.(\\d+)\\.(\\d+)",family_replacement:"Mobile Safari",tablet:true,manufacturer:"Apple"},{regex:"(iPad).*Version/(\\d+)\\.(\\d+)",family_replacement:"Mobile Safari",tablet:true,manufacturer:"Apple"},{regex:"(iPad)",family_replacement:"Mobile Safari",tablet:true,manufacturer:"Apple"},{regex:"(PlayBook).+RIM Tablet OS (\\d+)\\.(\\d+)\\.(\\d+)",family_replacement:"Blackberry",tablet:true,manufacturer:"Nokia"},{regex:"(Black[bB]erry).+Version/(\\d+)\\.(\\d+)\\.(\\d+)",family_replacement:"Blackberry",manufacturer:"RIM"},{regex:"(Black[bB]erry)\\s?(\\d+)",family_replacement:"Blackberry",manufacturer:"RIM"},{regex:"(OmniWeb)/v(\\d+)\\.(\\d+)"},{regex:"(AppleWebKit)/(\\d+)\\.?(\\d+)?\\+ .* Version/\\d+\\.\\d+.\\d+ Safari/",family_replacement:"Safari"},{regex:"(Version)/(\\d+)\\.(\\d+)(?:\\.(\\d+))?.*Safari/",family_replacement:"Safari"},{regex:"(Safari)/\\d+"},{regex:"Trident(.*)rv.(\\d+)\\.(\\d+)",family_replacement:"IE"},{regex:"(MSIE) (\\d+)\\.(\\d+)",family_replacement:"IE"}],os_parsers:[{regex:"(Silk-Accelerated=[a-z]{4,5})",os_replacement:"Android"},{regex:"(Windows Phone 6\\.5)",os_replacement:"Windows Phone"},{regex:"(XBLWP7)",os_replacement:"Windows Phone"},{regex:"(Windows Phone OS) (\\d+)\\.(\\d+)",os_replacement:"Windows Phone"},{regex:"(Win)",os_replacement:"Windows"},{regex:"(Mac) OS X (\\d+)[_.](\\d+)(?:[_.](\\d+))?",manufacturer:"Apple"},{regex:"(?:PPC|Intel) (Mac OS X)",os_replacement:"Mac",manufacturer:"Apple"},{regex:"(iPhone|iPod)",os_replacement:"iPhone",manufacturer:"Apple"},{regex:"(iPad)",os_replacement:"iPad",tablet:true,manufacturer:"Apple"},{regex:"(CrOS) [a-z0-9_]+ (\\d+)\\.(\\d+)(?:\\.(\\d+))?",os_replacement:"Chrome OS"},{regex:"(Symbian[Oo][Ss])/(\\d+)\\.(\\d+)",os_replacement:"Symbian"},{regex:"(Symbian/3).+NokiaBrowser/7\\.3",os_replacement:"Symbian"},{regex:"(Symbian/3).+NokiaBrowser/7\\.4",os_replacement:"Symbian"},{regex:"(Symbian/3)",os_replacement:"Symbian"},{regex:"(Series 60|SymbOS|S60)",os_replacement:"Symbian"},{regex:"Symbian [Oo][Ss]",os_replacement:"Symbian"},{regex:"(Black[Bb]erry)[0-9a-z]+/(\\d+)\\.(\\d+)\\.(\\d+)(?:\\.(\\d+))?",os_replacement:"BlackBerry",manufacturer:"RIM"},{regex:"(Black[Bb]erry).+Version/(\\d+)\\.(\\d+)\\.(\\d+)(?:\\.(\\d+))?",os_replacement:"BlackBerry",manufacturer:"RIM"},{regex:"(RIM Tablet OS) (\\d+)\\.(\\d+)\\.(\\d+)",os_replacement:"BlackBerry",tablet:true,manufacturer:"RIM"},{regex:"(Play[Bb]ook)",os_replacement:"BlackBerry",tablet:true,manufacturer:"RIM"},{regex:"(Black[Bb]erry)",os_replacement:"Blackberry",manufacturer:"RIM"},{regex:"(Linux)"},{regex:"(Android)"}],mobile_os_families:["Windows Phone","Windows CE","Symbian"],device_parsers:[],mobile_browser_families:["Firefox Mobile","Opera Mobile","Opera Mini","Mobile Safari","webOS","IE Mobile","Playstation Portable","Nokia","Blackberry","Palm","Silk","Android","Maemo","Obigo","Netfront","AvantGo","Teleca","SEMC-Browser","Bolt","Iris","UP.Browser","Symphony","Minimo","Bunjaloo","Jasmine","Dolfin","Polaris","BREW","Chrome Mobile","Chrome Mobile iOS","UC Browser","Tizen Browser"]};_this.parsers=["device_parsers","browser_parsers","os_parsers","mobile_os_families","mobile_browser_families"];_this.types=["browser","os","device"];_this.regexes=regexes||function(){var results={};_this.parsers.map(function(parser){results[parser]=[]});return results}();_this.families=function(){var results={};_this.types.map(function(type){results[type]=[]});return results}();var ArrayProto=Array.prototype,ObjProto=Object.prototype,FuncProto=Function.prototype,nativeForEach=ArrayProto.forEach,nativeIndexOf=ArrayProto.indexOf;var find=function(ua,obj){var ret={};for(var i=0;i<obj.length;i++){ret=obj[i](ua);if(ret){break}}return ret};var remove=function(arr,props){each(arr,function(obj){each(props,function(prop){delete obj[prop]
+(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 Base64=require("./base64");var Cookie=require("./cookie");var JSON=require("json");var Request=require("./xhr");var UTF8=require("./utf8");var UUID=require("./uuid");var md5=require("./md5");var localStorage=require("./localstorage");var detect=require("./detect");var version=require("./version");var object=require("object");var log=function(s){console.log("[Amplitude] "+s)};var API_VERSION=2;var DEFAULT_OPTIONS={apiEndpoint:"api.amplitude.com",cookieName:"amplitude_id",cookieExpiration:365*10,unsentKey:"amplitude_unsent",saveEvents:true,domain:undefined,sessionTimeout:30*60*1e3,platform:"Web"};var LocalStorageKeys={LAST_EVENT_ID:"amplitude_lastEventId",LAST_EVENT_TIME:"amplitude_lastEventTime",SESSION_ID:"amplitude_sessionId"};var Amplitude=function(){this._unsentEvents=[];this._ua=detect.parse(navigator.userAgent);this.options=object.merge({},DEFAULT_OPTIONS)};Amplitude.prototype._eventId=0;Amplitude.prototype._sending=false;Amplitude.prototype._lastEventTime=null;Amplitude.prototype._sessionId=null;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}this.options.platform=opt_config.platform||this.options.platform;this.options.sessionTimeout=opt_config.sessionTimeout||this.options.sessionTimeout}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()}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._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.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}}};var _saveCookieData=function(scope){Cookie.set(scope.options.cookieName,{deviceId:scope.options.deviceId,userId:scope.options.userId,globalUserProperties:scope.options.userProperties})};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.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){if(!eventType){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);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.family,os_version:ua.browser.version,device_model:ua.os.family,event_properties:eventProperties,user_properties:this.options.userProperties||{},uuid:UUID(),library:{name:"amplitude-js",version:this.__VERSION__}};this._unsentEvents.push(event);if(this.options.saveEvents){this.saveEvents()}this.sendEvents()}catch(e){log(e)}};Amplitude.prototype.sendEvents=function(){if(!this._sending){this._sending=true;var url=("https:"==window.location.protocol?"https":"http")+"://"+this.options.apiEndpoint+"/";var events=JSON.stringify(this._unsentEvents);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 numEvents=this._unsentEvents.length;var scope=this;new Request(url,data).send(function(response){scope._sending=false;try{if(response=="success"){scope._unsentEvents.splice(0,numEvents);if(scope.options.saveEvents){scope.saveEvents()}if(scope._unsentEvents.length>0){scope.sendEvents()}}}catch(e){}})}};Amplitude.prototype.setGlobalUserProperties=Amplitude.prototype.setUserProperties;Amplitude.prototype.__VERSION__=version;module.exports=Amplitude},{"./base64":3,"./cookie":4,json:5,"./xhr":6,"./utf8":7,"./uuid":8,"./md5":9,"./localstorage":10,"./detect":11,"./version":12,object:13}],3:[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":7}],7:[function(require,module,exports){var UTF8={encode:function(s){s=s.replace(/\r\n/g,"\n");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 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":3,json:5,"top-domain":14}],5:[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":15}],15:[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:16}],16:[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}}},{}],6:[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){if(xhr.status==200){callback(xhr.responseText)}}};xhr.setRequestHeader("Content-Type","application/x-www-form-urlencoded; charset=UTF-8");xhr.send(querystring.stringify(this.data))}};module.exports=Request},{querystring:17}],17:[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:18,type:19}],18:[function(require,module,exports){exports=module.exports=trim;function trim(str){if(str.trim)return str.trim();return str.replace(/^\s*|\s*$/g,"")}exports.left=function(str){if(str.trimLeft)return str.trimLeft();return str.replace(/^\s*/,"")};exports.right=function(str){if(str.trimRight)return str.trimRight();return str.replace(/\s*$/,"")}},{}],19:[function(require,module,exports){var toString=Object.prototype.toString;module.exports=function(val){switch(toString.call(val)){case"[object Function]":return"function";case"[object Date]":return"date";case"[object RegExp]":return"regexp";case"[object Arguments]":return"arguments";case"[object Array]":return"array";case"[object String]":return"string"}if(val===null)return"null";if(val===undefined)return"undefined";if(val&&val.nodeType===1)return"element";if(val===Object(val))return"object";return typeof val}},{}],8:[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},{}],9:[function(require,module,exports){var UTF8=require("./utf8");var md5cycle=function(x,k){var a=x[0],b=x[1],c=x[2],d=x[3];a=ff(a,b,c,d,k[0],7,-680876936);d=ff(d,a,b,c,k[1],12,-389564586);c=ff(c,d,a,b,k[2],17,606105819);b=ff(b,c,d,a,k[3],22,-1044525330);a=ff(a,b,c,d,k[4],7,-176418897);d=ff(d,a,b,c,k[5],12,1200080426);c=ff(c,d,a,b,k[6],17,-1473231341);b=ff(b,c,d,a,k[7],22,-45705983);a=ff(a,b,c,d,k[8],7,1770035416);d=ff(d,a,b,c,k[9],12,-1958414417);c=ff(c,d,a,b,k[10],17,-42063);b=ff(b,c,d,a,k[11],22,-1990404162);a=ff(a,b,c,d,k[12],7,1804603682);d=ff(d,a,b,c,k[13],12,-40341101);c=ff(c,d,a,b,k[14],17,-1502002290);b=ff(b,c,d,a,k[15],22,1236535329);a=gg(a,b,c,d,k[1],5,-165796510);d=gg(d,a,b,c,k[6],9,-1069501632);c=gg(c,d,a,b,k[11],14,643717713);b=gg(b,c,d,a,k[0],20,-373897302);a=gg(a,b,c,d,k[5],5,-701558691);d=gg(d,a,b,c,k[10],9,38016083);c=gg(c,d,a,b,k[15],14,-660478335);b=gg(b,c,d,a,k[4],20,-405537848);a=gg(a,b,c,d,k[9],5,568446438);d=gg(d,a,b,c,k[14],9,-1019803690);c=gg(c,d,a,b,k[3],14,-187363961);b=gg(b,c,d,a,k[8],20,1163531501);a=gg(a,b,c,d,k[13],5,-1444681467);d=gg(d,a,b,c,k[2],9,-51403784);c=gg(c,d,a,b,k[7],14,1735328473);b=gg(b,c,d,a,k[12],20,-1926607734);a=hh(a,b,c,d,k[5],4,-378558);d=hh(d,a,b,c,k[8],11,-2022574463);c=hh(c,d,a,b,k[11],16,1839030562);b=hh(b,c,d,a,k[14],23,-35309556);a=hh(a,b,c,d,k[1],4,-1530992060);d=hh(d,a,b,c,k[4],11,1272893353);c=hh(c,d,a,b,k[7],16,-155497632);b=hh(b,c,d,a,k[10],23,-1094730640);a=hh(a,b,c,d,k[13],4,681279174);d=hh(d,a,b,c,k[0],11,-358537222);c=hh(c,d,a,b,k[3],16,-722521979);b=hh(b,c,d,a,k[6],23,76029189);a=hh(a,b,c,d,k[9],4,-640364487);d=hh(d,a,b,c,k[12],11,-421815835);c=hh(c,d,a,b,k[15],16,530742520);b=hh(b,c,d,a,k[2],23,-995338651);a=ii(a,b,c,d,k[0],6,-198630844);d=ii(d,a,b,c,k[7],10,1126891415);c=ii(c,d,a,b,k[14],15,-1416354905);b=ii(b,c,d,a,k[5],21,-57434055);a=ii(a,b,c,d,k[12],6,1700485571);d=ii(d,a,b,c,k[3],10,-1894986606);c=ii(c,d,a,b,k[10],15,-1051523);b=ii(b,c,d,a,k[1],21,-2054922799);a=ii(a,b,c,d,k[8],6,1873313359);d=ii(d,a,b,c,k[15],10,-30611744);c=ii(c,d,a,b,k[6],15,-1560198380);b=ii(b,c,d,a,k[13],21,1309151649);a=ii(a,b,c,d,k[4],6,-145523070);d=ii(d,a,b,c,k[11],10,-1120210379);c=ii(c,d,a,b,k[2],15,718787259);b=ii(b,c,d,a,k[9],21,-343485551);x[0]=add32(a,x[0]);x[1]=add32(b,x[1]);x[2]=add32(c,x[2]);x[3]=add32(d,x[3])};var cmn=function(q,a,b,x,s,t){a=add32(add32(a,q),add32(x,t));return add32(a<<s|a>>>32-s,b)};var ff=function(a,b,c,d,x,s,t){return cmn(b&c|~b&d,a,b,x,s,t)};var gg=function(a,b,c,d,x,s,t){return cmn(b&d|c&~d,a,b,x,s,t)};var hh=function(a,b,c,d,x,s,t){return cmn(b^c^d,a,b,x,s,t)};var ii=function(a,b,c,d,x,s,t){return cmn(c^(b|~d),a,b,x,s,t)};var md51=function(s){s=UTF8.encode(s);var n=s.length,state=[1732584193,-271733879,-1732584194,271733878],i;for(i=64;i<=s.length;i+=64){md5cycle(state,md5blk(s.substring(i-64,i)))}s=s.substring(i-64);var tail=[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0];for(i=0;i<s.length;i++)tail[i>>2]|=s.charCodeAt(i)<<(i%4<<3);tail[i>>2]|=128<<(i%4<<3);if(i>55){md5cycle(state,tail);for(i=0;i<16;i++)tail[i]=0}tail[14]=n*8;md5cycle(state,tail);return state};var md5blk=function(s){var md5blks=[],i;for(i=0;i<64;i+=4){md5blks[i>>2]=s.charCodeAt(i)+(s.charCodeAt(i+1)<<8)+(s.charCodeAt(i+2)<<16)+(s.charCodeAt(i+3)<<24)}return md5blks};var hex_chr="0123456789abcdef".split("");var rhex=function(n){var s="",j=0;for(;j<4;j++)s+=hex_chr[n>>j*8+4&15]+hex_chr[n>>j*8&15];return s};var hex=function(x){for(var i=0;i<x.length;i++)x[i]=rhex(x[i]);return x.join("")};var md5=function(s){return hex(md51(s))};var add32=function(a,b){return a+b&4294967295};if(md5("hello")!="5d41402abc4b2a76b9719d911017c592"){var add32=function(x,y){var lsw=(x&65535)+(y&65535),msw=(x>>16)+(y>>16)+(lsw>>16);return msw<<16|lsw&65535}}module.exports=md5},{"./utf8":7}],10:[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},{}],11:[function(require,module,exports){(function(root,undefined){if(!Array.prototype.map){Array.prototype.map=function(callback,thisArg){var T,A,k;if(this==null){throw new TypeError(" this is null or not defined")}var O=Object(this);var len=O.length>>>0;if(typeof callback!=="function"){throw new TypeError(callback+" is not a function")}if(thisArg){T=thisArg}A=new Array(len);k=0;while(k<len){var kValue,mappedValue;if(k in O){kValue=O[k];mappedValue=callback.call(T,kValue,k,O);A[k]=mappedValue}k++}return A}}var detect=root.detect=function(){var _this=function(){};var regexes={browser_parsers:[{regex:"(SeaMonkey|Camino)/(\\d+)\\.(\\d+)\\.?([ab]?\\d+[a-z]*)",family_replacement:"Camino"},{regex:"(Fennec)/(\\d+)\\.(\\d+)\\.?([ab]?\\d+[a-z]*)",family_replacement:"Firefox Mobile"},{regex:"(Fennec)/(\\d+)\\.(\\d+)(pre)",family_replacment:"Firefox Mobile"},{regex:"(Fennec)/(\\d+)\\.(\\d+)",family_replacement:"Firefox Mobile"},{regex:"Mobile.*(Firefox)/(\\d+)\\.(\\d+)",family_replacement:"Firefox"},{regex:"(Namoroka|Shiretoko|Minefield)/(\\d+)\\.(\\d+)\\.(\\d+(?:pre)?)",family_replacement:"Firefox"},{regex:"(Firefox)/(\\d+)\\.(\\d+)(a\\d+[a-z]*)",family_replacement:"Firefox"},{regex:"(Firefox)/(\\d+)\\.(\\d+)(b\\d+[a-z]*)",family_replacement:"Firefox"},{regex:"(Firefox)-(?:\\d+\\.\\d+)?/(\\d+)\\.(\\d+)(a\\d+[a-z]*)",family_replacement:"Firefox"},{regex:"(Firefox)-(?:\\d+\\.\\d+)?/(\\d+)\\.(\\d+)(b\\d+[a-z]*)",family_replacement:"Firefox"},{regex:"(Namoroka|Shiretoko|Minefield)/(\\d+)\\.(\\d+)([ab]\\d+[a-z]*)?",family_replacement:"Firefox"},{regex:"(Navigator)/(\\d+)\\.(\\d+)\\.(\\d+)",family_replacement:"Netscape"},{regex:"(Navigator)/(\\d+)\\.(\\d+)([ab]\\d+)",family_replacement:"Netscape"},{regex:"(Netscape6)/(\\d+)\\.(\\d+)\\.(\\d+)",family_replacement:"Netscape"},{regex:"(Opera Tablet).*Version/(\\d+)\\.(\\d+)(?:\\.(\\d+))?",family_replacement:"Opera Mobile",tablet:true},{regex:"(Opera)/.+Opera Mobi.+Version/(\\d+)\\.(\\d+)",family_replacement:"Opera Mobile"},{regex:"Opera Mobi",family_replacement:"Opera Mobile"},{regex:"(Opera Mini)/(\\d+)\\.(\\d+)",family_replacement:"Opera Mini"},{regex:"(Opera Mini)/att/(\\d+)\\.(\\d+)",family_replacement:"Opera Mini"},{regex:"(Opera)/9.80.*Version/(\\d+)\\.(\\d+)(?:\\.(\\d+))?",family_replacement:"Opera"},{regex:"(konqueror)/(\\d+)\\.(\\d+)\\.(\\d+)",family_replacement:"Konqueror"},{regex:"(CrMo)/(\\d+)\\.(\\d+)\\.(\\d+)\\.(\\d+)",family_replacement:"Chrome Mobile"},{regex:"(CriOS)/(\\d+)\\.(\\d+)\\.(\\d+)\\.(\\d+)",family_replacement:"Chrome Mobile"},{regex:"(Chrome)/(\\d+)\\.(\\d+)\\.(\\d+)\\.(\\d+) Mobile",family_replacement:"Chrome Mobile"},{regex:"(KDE)",family_replacement:"Konqueror"},{regex:"(OmniWeb|Camino|Chrome|Netscape|Konqueror|Opera Mini|iCab)/(\\d+)\\.(\\d+)\\.(\\d+)"},{regex:"(Camino|Chrome|Netscape|Opera Mini|Opera|Konqueror|iCab)/(\\d+)\\.(\\d+)"},{regex:"(iCab) (\\d+)\\.(\\d+)\\.(\\d+)"},{regex:"(iCab|Opera) (\\d+)\\.(\\d+)\\.?(\\d+)?"},{regex:"(IEMobile)[ /](\\d+)\\.(\\d+)",family_replacement:"IE Mobile"},{regex:"(MSIE) (\\d+)\\.(\\d+).*XBLWP7",family_replacement:"IE"},{regex:"(Firefox)/(\\d+)\\.(\\d+)\\.(\\d+)"},{regex:"(Firefox)/(\\d+)\\.(\\d+)(pre|[ab]\\d+[a-z]*)?"},{regex:"(iPod).+Version/(\\d+)\\.(\\d+)\\.(\\d+)",family_replacement:"Mobile Safari",manufacturer:"Apple"},{regex:"(iPod).*Version/(\\d+)\\.(\\d+)",family_replacement:"Mobile Safari",manufacturer:"Apple"},{regex:"(iPod)",family_replacement:"Mobile Safari",manufacturer:"Apple"},{regex:"(iPhone).*Version/(\\d+)\\.(\\d+)\\.(\\d+)",family_replacement:"Mobile Safari",manufacturer:"Apple"},{regex:"(iPhone).*Version/(\\d+)\\.(\\d+)",family_replacement:"Mobile Safari",manufacturer:"Apple"},{regex:"(iPhone)",family_replacement:"Mobile Safari",manufacturer:"Apple"},{regex:"(iPad).*Version/(\\d+)\\.(\\d+)\\.(\\d+)",family_replacement:"Mobile Safari",tablet:true,manufacturer:"Apple"},{regex:"(iPad).*Version/(\\d+)\\.(\\d+)",family_replacement:"Mobile Safari",tablet:true,manufacturer:"Apple"},{regex:"(iPad)",family_replacement:"Mobile Safari",tablet:true,manufacturer:"Apple"},{regex:"(PlayBook).+RIM Tablet OS (\\d+)\\.(\\d+)\\.(\\d+)",family_replacement:"Blackberry",tablet:true,manufacturer:"Nokia"},{regex:"(Black[bB]erry).+Version/(\\d+)\\.(\\d+)\\.(\\d+)",family_replacement:"Blackberry",manufacturer:"RIM"},{regex:"(Black[bB]erry)\\s?(\\d+)",family_replacement:"Blackberry",manufacturer:"RIM"},{regex:"(OmniWeb)/v(\\d+)\\.(\\d+)"},{regex:"(AppleWebKit)/(\\d+)\\.?(\\d+)?\\+ .* Version/\\d+\\.\\d+.\\d+ Safari/",family_replacement:"Safari"},{regex:"(Version)/(\\d+)\\.(\\d+)(?:\\.(\\d+))?.*Safari/",family_replacement:"Safari"},{regex:"(Safari)/\\d+"},{regex:"Trident(.*)rv.(\\d+)\\.(\\d+)",family_replacement:"IE"},{regex:"(MSIE) (\\d+)\\.(\\d+)",family_replacement:"IE"}],os_parsers:[{regex:"(Silk-Accelerated=[a-z]{4,5})",os_replacement:"Android"},{regex:"(Windows Phone 6\\.5)",os_replacement:"Windows Phone"},{regex:"(XBLWP7)",os_replacement:"Windows Phone"},{regex:"(Windows Phone OS) (\\d+)\\.(\\d+)",os_replacement:"Windows Phone"},{regex:"(Win)",os_replacement:"Windows"},{regex:"(Mac) OS X (\\d+)[_.](\\d+)(?:[_.](\\d+))?",manufacturer:"Apple"},{regex:"(?:PPC|Intel) (Mac OS X)",os_replacement:"Mac",manufacturer:"Apple"},{regex:"(iPhone|iPod)",os_replacement:"iPhone",manufacturer:"Apple"},{regex:"(iPad)",os_replacement:"iPad",tablet:true,manufacturer:"Apple"},{regex:"(CrOS) [a-z0-9_]+ (\\d+)\\.(\\d+)(?:\\.(\\d+))?",os_replacement:"Chrome OS"},{regex:"(Symbian[Oo][Ss])/(\\d+)\\.(\\d+)",os_replacement:"Symbian"},{regex:"(Symbian/3).+NokiaBrowser/7\\.3",os_replacement:"Symbian"},{regex:"(Symbian/3).+NokiaBrowser/7\\.4",os_replacement:"Symbian"},{regex:"(Symbian/3)",os_replacement:"Symbian"},{regex:"(Series 60|SymbOS|S60)",os_replacement:"Symbian"},{regex:"Symbian [Oo][Ss]",os_replacement:"Symbian"},{regex:"(Black[Bb]erry)[0-9a-z]+/(\\d+)\\.(\\d+)\\.(\\d+)(?:\\.(\\d+))?",os_replacement:"BlackBerry",manufacturer:"RIM"},{regex:"(Black[Bb]erry).+Version/(\\d+)\\.(\\d+)\\.(\\d+)(?:\\.(\\d+))?",os_replacement:"BlackBerry",manufacturer:"RIM"},{regex:"(RIM Tablet OS) (\\d+)\\.(\\d+)\\.(\\d+)",os_replacement:"BlackBerry",tablet:true,manufacturer:"RIM"},{regex:"(Play[Bb]ook)",os_replacement:"BlackBerry",tablet:true,manufacturer:"RIM"},{regex:"(Black[Bb]erry)",os_replacement:"Blackberry",manufacturer:"RIM"},{regex:"(Linux)"},{regex:"(Android)"}],mobile_os_families:["Windows Phone","Windows CE","Symbian"],device_parsers:[],mobile_browser_families:["Firefox Mobile","Opera Mobile","Opera Mini","Mobile Safari","webOS","IE Mobile","Playstation Portable","Nokia","Blackberry","Palm","Silk","Android","Maemo","Obigo","Netfront","AvantGo","Teleca","SEMC-Browser","Bolt","Iris","UP.Browser","Symphony","Minimo","Bunjaloo","Jasmine","Dolfin","Polaris","BREW","Chrome Mobile","Chrome Mobile iOS","UC Browser","Tizen Browser"]};_this.parsers=["device_parsers","browser_parsers","os_parsers","mobile_os_families","mobile_browser_families"];_this.types=["browser","os","device"];_this.regexes=regexes||function(){var results={};_this.parsers.map(function(parser){results[parser]=[]});return results}();_this.families=function(){var results={};_this.types.map(function(type){results[type]=[]});return results}();var ArrayProto=Array.prototype,ObjProto=Object.prototype,FuncProto=Function.prototype,nativeForEach=ArrayProto.forEach,nativeIndexOf=ArrayProto.indexOf;var find=function(ua,obj){var ret={};for(var i=0;i<obj.length;i++){ret=obj[i](ua);if(ret){break}}return ret};var remove=function(arr,props){each(arr,function(obj){each(props,function(prop){delete obj[prop]
 })})};var contains=function(obj,target){var found=false;if(obj==null)return found;if(nativeIndexOf&&obj.indexOf===nativeIndexOf)return obj.indexOf(target)!=-1;found=any(obj,function(value){return value===target});return found};var each=forEach=function(obj,iterator,context){if(obj==null)return;if(nativeForEach&&obj.forEach===nativeForEach){obj.forEach(iterator,context)}else if(obj.length===+obj.length){for(var i=0,l=obj.length;i<l;i++){iterator.call(context,obj[i],i,obj)}}else{for(var key in obj){if(_.has(obj,key)){iterator.call(context,obj[key],key,obj)}}}};var extend=function(obj){each(slice.call(arguments,1),function(source){for(var prop in source){obj[prop]=source[prop]}});return obj};var check=function(str){return!!(str&&typeof str!="undefined"&&str!=null)};var toVersionString=function(obj){var output="";obj=obj||{};if(check(obj)){if(check(obj.major)){output+=obj.major;if(check(obj.minor)){output+="."+obj.minor;if(check(obj.patch)){output+="."+obj.patch}}}}return output};var toString=function(obj){obj=obj||{};var suffix=toVersionString(obj);if(suffix)suffix=" "+suffix;return obj&&check(obj.family)?obj.family+suffix:""};_this.parse=function(ua){var parsers=function(type){return _this.regexes[type+"_parsers"].map(function(obj){var regexp=new RegExp(obj.regex),rep=obj[(type==="browser"?"family":type)+"_replacement"],major_rep=obj.major_version_replacement;function parser(ua){var m=ua.match(regexp);if(!m)return null;var ret={};ret.family=(rep?rep.replace("$1",m[1]):m[1])||null;ret.major=parseInt(major_rep?major_rep:m[2])||null;ret.minor=m[3]?parseInt(m[3]):null;ret.patch=m[4]?parseInt(m[4]):null;ret.tablet=obj.tablet;ret.man=obj.manufacturer||null;return ret}return parser})};var UserAgent=function(){};var browser_parsers=parsers("browser");var os_parsers=parsers("os");var device_parsers=parsers("device");var a=new UserAgent;a.source=ua;a.browser=find(ua,browser_parsers);if(check(a.browser)){a.browser.name=toString(a.browser);a.browser.version=toVersionString(a.browser)}else{a.browser={}}a.os=find(ua,os_parsers);if(check(a.os)){a.os.name=toString(a.os);a.os.version=toVersionString(a.os)}else{a.os={}}a.device=find(ua,device_parsers);if(check(a.device)){a.device.name=toString(a.device);a.device.version=toVersionString(a.device)}else{a.device={tablet:false,family:null}}var mobile_agents={};var mobile_browser_families=_this.regexes.mobile_browser_families.map(function(str){mobile_agents[str]=true});var mobile_os_families=_this.regexes.mobile_os_families.map(function(str){mobile_agents[str]=true});if(a.browser.family==="Spider"){a.device.type="Spider"}else if(a.browser.tablet||a.os.tablet||a.device.tablet){a.device.type="Tablet"}else if(mobile_agents.hasOwnProperty(a.browser.family)){a.device.type="Mobile"}else{a.device.type="Desktop"}a.device.manufacturer=a.browser.man||a.os.man||a.device.man||null;remove([a.browser,a.os,a.device],["tablet","man"]);return a};return _this}();if(typeof exports!=="undefined"){if(typeof module!=="undefined"&&module.exports){exports=module.exports=detect}exports.detect=detect}else{root["detect"]=detect}if(typeof define==="function"&&define.amd){define(function(require){return detect})}})(window)},{}],12:[function(require,module,exports){module.exports="2.0.1"},{}],13:[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)}},{}]},{},{1:""}));
\ No newline at end of file
diff --git a/src/amplitude.js b/src/amplitude.js
index c6810db7..f45275b8 100644
--- a/src/amplitude.js
+++ b/src/amplitude.js
@@ -214,15 +214,13 @@ Amplitude.prototype.logEvent = function(eventType, eventProperties) {
   try {
     var eventTime = new Date().getTime();
     var eventId = this.nextEventId();
-    var sessionId = this._sessionId;
-    var lastEventTime = this._lastEventTime;
     var ua = this._ua;
-    if (!sessionId || !lastEventTime || eventTime - lastEventTime > this.options.sessionTimeout) {
-      sessionId = eventTime;
-      localStorage.setItem(LocalStorageKeys.SESSION_ID, sessionId);
+    if (!this._sessionId || !this._lastEventTime || eventTime - this._lastEventTime > this.options.sessionTimeout) {
+      this._sessionId = eventTime;
+      localStorage.setItem(LocalStorageKeys.SESSION_ID, this._sessionId);
     }
-    lastEventTime = eventTime;
-    localStorage.setItem(LocalStorageKeys.LAST_EVENT_TIME, lastEventTime);
+    this._lastEventTime = eventTime;
+    localStorage.setItem(LocalStorageKeys.LAST_EVENT_TIME, this._lastEventTime);
     localStorage.setItem(LocalStorageKeys.LAST_EVENT_ID, eventId);
 
     eventProperties = eventProperties || {};
@@ -231,7 +229,7 @@ Amplitude.prototype.logEvent = function(eventType, eventProperties) {
       user_id: this.options.userId || this.options.deviceId,
       timestamp: eventTime,
       event_id: eventId,
-      session_id: sessionId || -1,
+      session_id: this._sessionId || -1,
       event_type: eventType,
       version_name: this.options.versionName || null,
       platform: this.options.platform,
diff --git a/test/amplitude.js b/test/amplitude.js
index 6132b34f..30ac23f9 100644
--- a/test/amplitude.js
+++ b/test/amplitude.js
@@ -167,4 +167,31 @@ describe('Amplitude', function() {
       assert.deepEqual(events[0].event_properties, {prop: true});
     });
   });
+
+  describe('sessionId', function() {
+
+    var clock;
+
+    beforeEach(function() {
+      clock = sinon.useFakeTimers();
+      amplitude.init(apiKey);
+    });
+
+    afterEach(function() {
+      reset();
+      clock.restore();
+    });
+
+    it('should create new session IDs on timeout', function() {
+      var sessionId = amplitude._sessionId;
+      clock.tick(30 * 60 * 1000 + 1);
+      amplitude.logEvent('Event Type 1');
+      assert.lengthOf(server.requests, 1);
+      var events = JSON.parse(querystring.parse(server.requests[0].requestBody).e);
+      assert.equal(events.length, 1);
+      assert.notEqual(events[0].session_id, sessionId);
+      assert.notEqual(amplitude._sessionId, sessionId);
+      assert.equal(events[0].session_id, amplitude._sessionId);
+    });
+  });
 });