function displayTable(whichField){
	document.getElementById('CF30').style.display="none";
	document.getElementById('CF15').style.display="none";
	document.getElementById('JF30').style.display="none";
	document.getElementById('JF15').style.display="none";
	document.getElementById(whichField.options[whichField.selectedIndex].value).style.display="block";
}

// Today's date script
		// by Kevin Lynn Brown
		// for Myers Internet Services
		// ©1999 All rights reserved
		var thisDate = new Date();
		var YY = thisDate.getYear();
		var YYstring = YY.toString();
		YY = (YYstring.length == 4) ? YY-2000:YY;
		YY = (YY < 10) ? "0" + YY:YY;
		var MM = thisDate.getMonth() + 1;
		MM = (MM < 10) ? "0" + MM:MM;
		var DD = thisDate.getDate();
		DD = (DD < 10) ? "0" + DD:DD;
		var today = MM + "/" + DD + "/" + YY;
		
		// Mini-banner randomizer
		// by Kevin Lynn Brown
		// for Myers Internet Services
		// ©1999 All rights reserved
		function preload() {
			this.length = preload.arguments.length;
			for (var i = 0; i < this.length; i++) {
				this[i] = new Image();
				this[i].src = preload.arguments[i];
			}
		}
		if (document.images) {
			var imgs = new preload(
				"/images/banner1.gif",
				"/images/banner2.gif"
				)
		}
		function randomNumber(n) {
			var r = Math.round(n * Math.random());
			return r;
		}
		function randomBanner() {
			var num = randomNumber(imgs.length-1);
			document.images["banner"].src = imgs[num].src
		}
		
	
// Monthly payment calculator
// derived from http://www.homepath.com/hpc1.html
// ©1997-1999 by Fannie Mae
// All rights reserved
function checkNum(inValue, VarName) {
	var NewVal="";
	var bFirst = true;
	num="0123456789.";
	if (parseFloat(inValue) == 0) {		//update new value
		document.forms["monthly"].elements[VarName].value = NewVal;	
		return;	
	}
	if (inValue != "") {
		for (var i=0;i<inValue.length;i++) {
			check=inValue.substring(i,i+1); 
			if (num.indexOf(check) >= 0) {
				if (bFirst) {	
					NewVal = check;
					bFirst = false;
				}
				else
					NewVal += check;
			}
		}		//update new value
		document.forms["monthly"].elements[VarName].value = NewVal;	
	}
 }
 
function Validate(form) {
	if (form.loanAmount.value == "") {
		document.forms["monthly"].elements[2].select();
		document.forms["monthly"].elements[2].focus();
		alert("Please enter Loan Balance");
		return false;
	}
	if (form.term.value == "") {
		document.forms["monthly"].elements[3].select();
		document.forms["monthly"].elements[3].focus();
		alert("Please enter Mortgage Term");
		return false;
	}
	else {
		if (parseInt(form.term.value) > 30) {
			document.forms["monthly"].elements[3].select();
			document.forms["monthly"].elements[3].focus();
			alert("Please enter a valid Mortgage Term");
			return false;
		}
	}
	if (form.rate.value == "")	{
		document.forms["monthly"].elements[5].select();
		document.forms["monthly"].elements[5].focus();
		alert("Please enter Interest Rate")
		return false;
	}
	return true;
}
function RoundUp(inValue) {	//this will round inValue to 2 decimal places
	var decimal = ".";
	var pos;
	var newValue;
	var temp1;
	var temp2;
	var temp3;
	var round;
	inValue += "";
	pos = inValue.indexOf(decimal);
	newValue = inValue.substring(0, 1);
	for (var i = 1; i <= pos; i++)
		newValue += inValue.substring(i, i+1);	
	temp1 = inValue.substring(i, i+1);	
	temp2 = inValue.substring(++i, i+1);
	temp3 = inValue.substring(++i, i+1);
	if (parseInt(temp3) >= 5) {
		round = parseInt(temp2);
		round++;
		newValue += temp1;
		newValue += round;		 
	}
	else {
		newValue += temp1;
		newValue += temp2;
	}	
	return newValue;
}   
// Currency function written by 
// Jim Ley - jim@jibbering.com
// All rights reserved
// Modified by Kevin Lynn Brown
function writeCurrencyFormat(num,dp,sepString) {
	if (!dp) {dp = 2;}
	if (!sepString) {sepString = ",.";}
	num = num * 1;
	num = Math.round(num*Math.pow(10,dp));
	num = num + "";
	str = sepString.charAt(1)+num.substring(num.length-dp) ;
	num = num.substring(0,num.length-dp);
	while (num.length > 3) {
		str = sepString.charAt(0)+num.substring(num.length-3)+str;
		num = num.substring(0,num.length-3);
	}
	str = num+str;
	return str;
}
function calculate(form,field) {	// This function adapted from HomePath
	// Additional statements for the
	// "SolveFor" capability written
	// by Kevin Lynn Brown
	// for www.erate.com
	// ©1999 All rights reserved
	// Myers Internet Services
	var temp;
	var form = document.forms["monthly"];
	for (var i=0;i < form.elements.length; i++) {
		if (form.elements[i].type == "text") {
			for (var y=0;y < form.elements[i].value.length;y++) {
				if (form.elements[i].value.charAt(y) == "$" || form.elements[i].value.charAt(y) == ",") {
		 				form.elements[i].value = form.elements[i].value.substring(0,y) + form.elements[i].value.substring(y+1);
				}
				if (form.elements[i].value.indexOf(".") != form.elements[i].value.indexOf(".")) {
		 				form.elements[i].value = form.elements[i].value.substring(0,form.elements[i].value.indexOf(".")) + form.elements[i].value.substring(form.elements[i].value.indexOf(".")+1);
				}
			}
		}
	}
	var LoanAmt = parseFloat(form.loanamount.value);
	var Rate = parseFloat(form.rate.value)/100.0;
	var iOrigTerm = parseInt(form.term.value) * 12;
	var MthlyPaymt = parseFloat(form.payment.value);
	var dMthlyIntRate = Rate / 12.0;    
    var dPI = 0.0;
    var dDenominator = dNumerator = 0.0;
	
	field = field + "";
	field = field.toLowerCase();
	if (field == "payment") {
	    dDenominator = (Math.pow((1+dMthlyIntRate),iOrigTerm) - 1);
	    dNumerator = dMthlyIntRate * (Math.pow((1 + dMthlyIntRate),iOrigTerm));
	    dPI = LoanAmt * (dNumerator / dDenominator);  
		sum = RoundUp(dPI);
		form.elements["loanamount"].value = writeCurrencyFormat(LoanAmt);
		form.elements[field].value = writeCurrencyFormat(sum);
	}
	else if (field == "loanamount") {
	    dDenominator = (Math.pow((1+dMthlyIntRate),iOrigTerm) - 1);
	    dNumerator = dMthlyIntRate * (Math.pow((1 + dMthlyIntRate),iOrigTerm));
		temp = MthlyPaymt / (dNumerator / dDenominator);
		sum = RoundUp(temp);
		form.elements[field].value = writeCurrencyFormat(sum);
		form.elements["payment"].value = writeCurrencyFormat(MthlyPaymt);
	}
	else if (field == "rate") {		// This is basically disabled		
		document.monthly.elements[field].value = Rate;
	}
	else if (field == "term") {
		temp = (-1/12) * (Math.log(1-(LoanAmt/MthlyPaymt)*dMthlyIntRate)) / Math.log(1+dMthlyIntRate);//		sum = Math.round(temp);
		sum = RoundUp(temp);
		form.elements["loanamount"].value = writeCurrencyFormat(LoanAmt);
		form.elements["payment"].value = writeCurrencyFormat(MthlyPaymt);
		form.elements[field].value = sum;
	}
	else { // default: solve for payment
	    dDenominator = (Math.pow((1+dMthlyIntRate),iOrigTerm) - 1);
	    dNumerator = dMthlyIntRate * (Math.pow((1 + dMthlyIntRate),iOrigTerm));
	    dPI = LoanAmt * (dNumerator / dDenominator);  
		sum = RoundUp(dPI);
		form.elements["loanamount"].value = writeCurrencyFormat(LoanAmt);
		form.elements[field].value = writeCurrencyFormat(sum);
	}
}

function calcDisclaimer() {
	var page = ''
		+'<HTML>\n'
		+'	<HEAD>\n'
		+'	<LINK REL="stylesheet" HREF="erate.css">\n'
		+'	</HEAD>\n'
		+'	<BODY BACKGROUND="images/RGB(247,244,245).jpg" BGCOLOR="cornsilk" onLoad="if(navigator.userAgent.indexOf(\'MSIE 3\')==-1){document.forms["monthly"].agree.focus();document.forms["monthly"].agree.select()}">\n'
		+'		<CENTER><FORM><A HREF="http://www.erate.com/main.shtml" TARGET="_top"><IMG SRC="images/logo9.gif" WIDTH="165" HEIGHT="33" HSPACE="0" VSPACE="0" BORDER="0" ALT="E Rate"></A><BR></CENTER>\n'
		+'	  <TABLE BORDER="0">\n'
		+'		<TR>\n'
		+'		  <TD BGCOLOR="#FFFFFF">\n'
		+'		<SPAN CLASS="ten">The Quick Loan Calculator is provided as a tool for estimating and does not constitute an offer for a mortgage.</SPAN>\n'
		+'		<CENTER><P><INPUT TYPE="Button" NAME="agree" VALUE="OK" onClick="self.close()"><BR></CENTER>\n'
		+'		  </TD>\n'
		+'		</TR>\n'
		+'		<TR>\n'
		+'		  <TD ALIGN="CENTER" BGCOLOR="cornsilk" BACKGROUND="images/RGB(247,244,245).jpg">\n'
		+'		<P CLASS="copyright">Copyright &copy;1999&nbsp;&nbsp;E&nbsp;RATE  All&nbsp;rights&nbsp;reserved<BR></P>\n'
		+'		  </TD>\n'
		+'		</TR>\n'
		+'	  </TABLE></FORM></CENTER>\n'
		+'	</BODY>\n'
		+'</HTML>\n'
		+'';
	var calcWin = window.open('javascript:document.write("")','','width=180,height=210');
	calcWin.document.open();
	calcWin.document.write(page);
	calcWin.document.close();
}	

function Rcertify() {
	popupWin = window.open('http://www.bbbonline.org/cks.asp?id=10206201951223705', 'Participant','location=yes,scrollbars=yes,width=450,height=300'); 
	window.name = 'opener';
}