function closeNote(which)
{
self.close()
}

function compute_down(which)
{
    var mortgage = document.MortgageForm;
    var percentvalue, down, loan;

    loan = mortgage.loanamount.value;
    while ((pos=loan.indexOf(",")) >= 0)
    {
    temp1 = loan.substring(0, pos);
    temp2 = loan.substring(pos+1, loan.length);
    loan = temp1 + temp2;
    }
    down = mortgage.downamount.value;
    while ((pos=down.indexOf(",")) >= 0)
    {
    temp1 = down.substring(0, pos);
    temp2 = down.substring(pos+1, down.length);
    down = temp1 + temp2;
    }
    if (which == "downamount")
    {
    percentvalue = Math.floor((parseFloat(down)/parseFloat(loan)*100.0)*100) / 100;
    mortgage.percent.value = percentvalue;
    }
    if (which == "percent")
    {
    down = parseInt(parseFloat(loan) * parseFloat(mortgage.percent.value) / 100.0);
    mortgage.downamount.value = down;
    }

    mortgage.loanamount.value = comma_it(mortgage.loanamount.value);
    mortgage.downamount.value = comma_it(mortgage.downamount.value);
}

function compute()
{
    var mortgage = document.MortgageForm;
    var annualRate, monthRate, months, principle, payment;
    var loan, down, pos, temp1, temp2;
        
    if (parseInt(mortgage.loanamount.value) <= 0)
    {
    if (parseInt(mortgage.loanamount.defaultValue) > 0)
    {
        mortgage.loanamount.value = mortgage.loanamount.defaultValue;
    }
    else
    {
        mortgage.loanamount.value = "100000";
    }
    }
    if (parseInt(mortgage.downamount.value) < 0)
    {
    if (parseInt(mortgage.downamount.defaultValue) >= 0)
    {
        mortgage.downamount.value = mortgage.downamount.defaultValue;
        mortgage.percent.value = mortgage.percent.defaultValue;
    }
    else
    {
        mortgage.downamount.value = parseInt(parseFloat(mortgage.loanamount.value) * 10.0 / 100.0);
        mortgage.percent.value = "10.0";
    }
    }
    if (parseInt(mortgage.percent.value) < 0)
    {
    if (parseInt(mortgage.percent.defaultValue) >= 0)
    {
        mortgage.downamount.value = mortgage.downamount.defaultValue;
        mortgage.percent.value = mortgage.percent.defaultValue;
    }
    else
    {
        mortgage.downamount.value = parseInt(parseFloat(mortgage.loanamount.value) * 10.0 / 100.0);
        mortgage.percent.value = "10.0";
    }
    }
    if (parseFloat(mortgage.rate.value) < 0.0)
    {
    if (parseFloat(mortgage.rate.defaultValue) > 0.0)
    {
        mortgage.rate.value = mortgage.rate.defaultValue;
    }
    else
    {
        mortgage.rate.value = "7.5";
    }
    }
    if (parseInt(mortgage.year.value) <= 0)
    {
    if (parseInt(mortgage.year.defaultValue) > 0)
    {
        mortgage.year.value = mortgage.year.defaultValue;
    }
    else
    {
        mortgage.year.value = "25";
    }
    }

    loan = mortgage.loanamount.value;
    while ((pos=loan.indexOf(",")) >= 0)
    {
    temp1 = loan.substring(0, pos);
    temp2 = loan.substring(pos+1, loan.length);
    loan = temp1 + temp2;
    }

    down = mortgage.downamount.value;
    while ((pos=down.indexOf(",")) >= 0)
    {
    temp1 = down.substring(0, pos);
    temp2 = down.substring(pos+1, down.length);
    down = temp1 + temp2;
    }

    annualRate = parseFloat(mortgage.rate.value) / 100;
    monthRate = annualRate / 12.0;
    months = parseInt(mortgage.year.value) * 12;
    principle = parseInt(loan) - parseInt(down);
    payment = Math.floor((principle*monthRate)/(1-Math.pow((1+monthRate),(-1*months)))*100)/100;

    mortgage.loan.value = principle;
    mortgage.numberof.value = months;
    mortgage.monthly.value = payment;
    mortgage.totalpayable.value = months*payment;

    mortgage.loanamount.value = comma_it(mortgage.loanamount.value);
    mortgage.downamount.value = comma_it(mortgage.downamount.value);
    mortgage.loan.value = comma_it(mortgage.loan.value);
    mortgage.monthly.value = comma_it(mortgage.monthly.value);
}

function comma_it(target)
{
    var newtarget, decimal, pos, temp1, temp2, i;

    newtarget = "";

    while ((pos=target.indexOf(",")) >= 0)
    {
    temp1 = target.substring(0, pos);
    temp2 = target.substring(pos+1, target.length);
    target = temp1 + temp2;
    }

    decimal = "";
    if ((pos=target.indexOf(".")) >= 0)
    {
    decimal = target.substring(pos, target.length);
    target = target.substring(0, pos);
    }

    for (i = target.length-1; i >= 0; i--)
    {
    if (((target.length-i-1) % 3) == 0)
    {
        if ((target.length-i-1) > 0)
        {
        newtarget = "," + newtarget;
        }
    }
    newtarget = target.substring(i,i+1) + newtarget;
    }

    newtarget = newtarget + decimal;

    return newtarget;
}