// JavaScript Document
<!--
function floor(number)
{
    return Math.floor(number*Math.pow(10,2))/Math.pow(10,2);
}
function dosum()
{
    var downpayment = document.temps.LA.value * document.temps.DP.value;
    var principal = document.temps.LA.value - downpayment;
    var mi = document.temps.IR.value / 1200;
    var base = 1;
    var mbase = 1 + mi;
    for (i=0; i<document.temps.YR.value * 12; i++)
    {
    base = base * mbase
    }
    document.temps.PI.value = formatCurrency(floor(principal * mi / ( 1 - (1/base))))
    document.temps.MT.value = formatCurrency(floor(document.temps.AT.value / 12))
    document.temps.MI.value = formatCurrency(floor(document.temps.AI.value / 12))
    var dasum = principal * mi / ( 1 - (1/base)) +
    document.temps.AT.value / 12 +
    document.temps.AI.value / 12;
    document.temps.MP.value = formatCurrency(floor(dasum));
}
function formatCurrency(num)
{
    num = num.toString().replace(/\$|\,/g,'');
    if(isNaN(num))
    num = "0";
    sign = (num == (num = Math.abs(num)));
    num = Math.floor(num*100+0.50000000001);
    cents = num%100;
    num = Math.floor(num/100).toString();
    if(cents<10)
    cents = "0" + cents;
    for (var i = 0; i < Math.floor((num.length-(1+i))/3); i++)
    num = num.substring(0,num.length-(4*i+3))+','+
    num.substring(num.length-(4*i+3));
    return (((sign)?'':'-') + '$' + num + '.' + cents);
}
//-->