document.getElementById("calc9").innerHTML = '<table width="450" border="0" cellspacing="0"><tr align="center">'+
'<td colspan="2" bgcolor="#FCF5DA"><span class="style2"><strong>15 vs 30 Year Mortgage</strong></span></td></tr>'+
'<tr><td colspan="2" bgcolor="#FCF5DA"><span class="style2">Use this calculator to compare payments and interest on a 15-year and 30-year mortgage.</span></td></tr>'+
'<tr><td class="style2">Amount of mortgage:</TD><TD><INPUT TYPE="text" class="textbox" id="amt999" SIZE="10"></TD></TR>'+
'<TR><TD class="style2">Interest rate: </TD><TD><INPUT TYPE="text" class="textbox" id="intr999" SIZE="4"><span class="style2">%</span></TD></TR>'+
'<TR align="center"><TD COLSPAN="2"><button onClick="computeForm999();">Calculate</button></TD></TR>'+
'<TR><TD class="style2">Amount of each payment for 15-year mortgage:</TD><TD><span class="style2" id="pay15999"></span></TD></TR>'+
'<TR><TD class="style2">Total interest paid for 15-year mortgage:</TD><TD><span class="style2" id="int15999"></span></TD></TR>'+
'<TR><TD class="style2">Amount of each payment for 30-year mortgage:</TD><TD><span class="style2" id="pay30999"></span></TD></TR>'+
'<TR><TD class="style2">Total interest paid for 30-year mortgage:</TD><TD><span class="style2" id="int30999"></span></TD></TR>'+
'<tr><td colspan="2"><strong><span class="style2" id="summary999"></span></strong></td></tr>'+
'<tr><td align="center" bgcolor="#FCF5DA" colspan="2" class="style2"><a href="http://www.mortgagemagic.info/">Mortgage Marketing</a> and <a href="http://www.freemortgagenewsletters.com">Free Mortgage Newsletters available now</a>.</td></tr>'+
'<tr><td bgcolor="#FCF5DA" colspan="2" class="style1">This information and&nbsp;calculator&nbsp;is a self-help tool for your independent use and&nbsp;is not intended to provide investment advice. We can not and do not guarantee their applicability or accuracy in regards to your&nbsp;personal situation.&nbsp;Please seek the help of a qualified mortgage specialist or&nbsp;other qualified professional&nbsp;regarding all personal finance issues.</td></tr></table>';

function computeForm999() {

var amt = parseInt(document.getElementById("amt999").value);
var intr = parseInt(document.getElementById("intr999").value);

intr = intr / 100;

var pay30 = amt * (((intr/12) * Math.pow(1+(intr/12),360)) / (Math.pow(1+(intr/12),360) - 1));
var pay15 = amt * (((intr/12) * Math.pow(1+(intr/12),180)) / (Math.pow(1+(intr/12),180) - 1));

var int30 = amt * (((intr/12)*360)/(1-Math.pow(1+(intr/12),-360))-1);
var int15 = amt * (((intr/12)*180)/(1-Math.pow(1+(intr/12),-180))-1);

document.getElementById("pay30999").innerHTML = "$" + addCommas999(Math.round(pay30,2));
document.getElementById("pay15999").innerHTML = "$" + addCommas999(Math.round(pay15,2));

document.getElementById("int30999").innerHTML = "$" + addCommas999(Math.round(int30,2));
document.getElementById("int15999").innerHTML = "$" + addCommas999(Math.round(int15,2));

document.getElementById("summary999").innerHTML = "If you choose a 15 year mortgage, your monthly payment will be $"+addCommas999(Math.round((pay15-pay30),2))+" more than with a 30 year mortgage.  However, you'll pay $"+addCommas999(Math.round((int30-int15),2))+" less interest over the term of your 15 year loan.";
}

function addCommas999(nStr)
{
        nStr += '';
        x = nStr.split('.');
        x1 = x[0];
        x2 = x.length > 1 ? '.' + x[1] : '';
        var rgx = /(\d+)(\d{3})/;
        while (rgx.test(x1)) {
                x1 = x1.replace(rgx, '$1' + ',' + '$2');
        }
        return x1 + x2;
}