Calculo de tabla de utilizacion de lupulo

[lautarobock]

Esto es para el tema de post-boil, q parece intersante
https://alchemyoverlord.wordpress.com/

http://realbeer.com/hops/bcalc_js.html

ver codigo javascript ahi
bcalc_js.html.zip

function checkNumber(input) {
        input.value = parseFloat(input.value);
        if(input.value == null ||          
           input.value.length == 0 ||
           input.value == "NaN" ||
           input.value <= 0) {
                input.value = "";
        }
        calcBitter(input.form);
}

function checkGravity(input) {
        input.value = parseFloat(input.value);
        if(input.value == null ||          
           input.value.length == 0 ||
           input.value == "NaN" ||
           input.value <= 0 || 
           input.value >= 2.0) {
                input.value = "";
        }
        calcBitter(input.form);
}

function checkAlpha(input) {
        input.value = parseFloat(input.value);
        if(input.value == null ||          
           input.value.length == 0 ||
           input.value == "NaN" ||
           input.value <= 0 || 
           input.value > 100) {
                input.value = "";
        }
        calcBitter(input.form);
}

//Main bitterness calculator function

function calcBitter(input) {
    var gravity;
    var volume;
    alpha = new Array(5);
    mass = new Array(5);
    time = new Array(5);
    util = new Array(5);
    mgperl = new Array(5);
    bu = 0;

    volume = parseFloat(document.bitter.volume.value);
    gravity = parseFloat(document.bitter.gravity.value)-1;
    document.bitter[27].value = 0

    for (i=0; i<5; i++) {
        if(document.bitter[2+i*5].value == "" || 
           document.bitter[3+i*5].value == "" || 
           document.bitter[4+i*5].value == "" || 
           document.bitter.gravity.value == "" || 
           document.bitter.volume.value == "") { 

                document.bitter[5+(i*5)].value = "";
                document.bitter[6+(i*5)].value = "";
        }
        else {
            alpha[i] = parseFloat(document.bitter[2+i*5].value)/100;
            mass[i] = parseFloat(document.bitter[3+i*5].value);
            time[i] = parseFloat(document.bitter[4+i*5].value);

            mgperl[i] = alpha[i]*mass[i]*7490/volume;
            util[i] = 1.65*Math.pow(0.000125, gravity)*(1-Math.exp(-0.04*time[i]))/4.15;

            document.bitter[5+i*5].value = Math.round(100*util[i]);
            document.bitter[6+i*5].value = Math.round(mgperl[i]*util[i]);
            bu += (mgperl[i]*util[i]);

            if(document.bitter[5+i*5].value == null || 
               document.bitter[5+i*5].value.length == 0 || 
               document.bitter[5+i*5].value == "NaN") {

                    document.bitter[5+i*5].value = "";
            }

            if(document.bitter[6+i*5].value == null || 
               document.bitter[6+i*5].value.length == 0 || 
               document.bitter[6+i*5].value == "NaN") {

                    document.bitter[6+i*5].value = "";
            }
        }
    }
    document.bitter.bu_total.value = Math.round(bu);
}