function calcularDiv(){
    var cant1 = document.calcform.cant1.value;
    cant1 = cant1.replace(",",".");
    if (isNaN(cant1) || cant1==""){
        alert(messages[61]);
        document.calcform.cant1.value = "";
        document.calcform.cant2.value = "";
        return false;
    }
    var combo1 = document.calcform.calc1;
    var div1all = combo1.options[combo1.selectedIndex].value;
    if (div1all.indexOf("#") == -1) {
        var div1 = div1all;
    }else{
        var div1split = div1all.split("#");
        var div1 = div1split[1];
    }
    var combo2 = document.calcform.calc2;
    var div2all = combo2.options[combo2.selectedIndex].value;
    if (div2all.indexOf("#") == -1) {
        var div2 = div2all;
    }else{
        var div2split = div2all.split("#");
        var div2 = div2split[1];
    }
    calculo = (cant1 / div1 ) * div2;
    calculo = calculo.toFixed(3);
    calculo = calculo.replace(".",",");
    document.calcform.cant2.value = " "+calculo;
    return false;
}