// JavaScript Document
function stripNum(num) {

var iPercent
var iDollar
var iSpace
var iComma
var numLength = num.length

//lalalla Line #114

if(numLength > 0) {

   num=num.toString();

   iPercent = num.indexOf("%");
   if(iPercent >= 0) {
      num=num.substring(0,iPercent) + "" + num.substring(iPercent + 1,numLength);
      numLength=num.length;
      }
   iDollar = num.indexOf("$");
   if(iDollar >= 0) {
      num=num.substring(0,iDollar) + "" + num.substring(iDollar + 1,numLength);
      numLength=num.length;
      }
   iSpace = num.indexOf(" ");
   if(iSpace >= 0) {
      num=num.substring(0,iSpace) + "" + num.substring(iSpace + 1,numLength);
      numLength=num.length;
      }
   iComma = num.indexOf(",");
   if(iComma >= 0) {
      while(iComma >=1) {
         num=num.substring(0,iComma) + "" + num.substring(iComma + 1,numLength);
         numLength=num.length;
         iComma = num.indexOf(",");
      }
      }

      num = eval(num);


} else {

num = 0;

}

return num;

}
function formatNumberDec(num, places, comma) {

var isNeg=0;

    if(num < 0) {
       num=num*-1;
       isNeg=1;
    }

    var myDecFact = 1;
    var myPlaces = 0;
    var myZeros = "";
    while(myPlaces < places) {
       myDecFact = myDecFact * 10;
       myPlaces = eval(myPlaces) + eval(1);
       myZeros = myZeros + "0";
    }
    
	onum=Math.round(num*myDecFact)/myDecFact;
		
	integer=Math.floor(onum);

	if (Math.ceil(onum) == integer) {
		decimal=myZeros;
	} else{
		decimal=Math.round((onum-integer)* myDecFact)
	}
	decimal=decimal.toString();
	if (decimal.length<places) {
        fillZeroes = places - decimal.length;
	   for (z=0;z<fillZeroes;z++) {
        decimal="0"+decimal;
        }
     }

   if(places > 0) {
      decimal = "." + decimal;
   }

   if(comma == 1) {
	integer=integer.toString();
	var tmpnum="";
	var tmpinteger="";
	var y=0;

	for (x=integer.length;x>0;x--) {
		tmpnum=tmpnum+integer.charAt(x-1);
		y=y+1;
		if (y==3 & x>1) {
			tmpnum=tmpnum+",";
			y=0;
		}
	}

	for (x=tmpnum.length;x>0;x--) {
		tmpinteger=tmpinteger+tmpnum.charAt(x-1);
	}


	finNum=tmpinteger+""+decimal;
   } else {
      finNum=integer+""+decimal;
   }

    if(isNeg == 1) {
       finNum = "-" + finNum;
    }

	return finNum;
}

function computeForm(form) {

if(form.moPmt.value.length == 0) {
   alert("Please the monthly payment amount you can afford.");
   form.moPmt.focus();
} else
if(form.intRate.value.length == 0) {
   alert("Please enter the loan's expected annual interest rate (enter zero for no-interest loans).");
   form.intRate.focus();
} else
if(form.months.value.length == 0) {
   alert("Please enter the term of the loan in months.");
   form.months.focus();
} else {

var VdownPay = stripNum(form.downPay.value);
var VmoPmt = stripNum(form.moPmt.value);
var VintRate = stripNum(form.intRate.value);
var Vmonths = stripNum(form.months.value);
var VtradeInVal = stripNum(form.tradeInVal.value);
var Vrebate = stripNum(form.rebate.value);

var VloanAmt = 0;
var VaffordCost = 0;

if(VintRate == 0) {

   VloanAmt = VmoPmt * Vmonths;
   form.loanAmt.value = "$" + formatNumberDec(VloanAmt,0,1);

   VaffordCost = eval(VloanAmt) + eval(VdownPay) + eval(VtradeInVal) + eval(Vrebate);
form.affordCost.value =  "$" + formatNumberDec(VaffordCost,0,1);

} else {

if(VintRate >= 1) {
   VintRate /= 100;
}
VintRate /= 12;

var pow = 1;

for (var j = 0; j < Vmonths; j++)
    pow = pow * (1 + VintRate);

VloanAmt = ((pow - 1) * VmoPmt) / (pow * VintRate);

form.loanAmt.value = "$" + formatNumberDec(VloanAmt,0,1);

VaffordCost = eval(VloanAmt) + eval(VdownPay) + eval(VtradeInVal) + eval(Vrebate);
form.affordCost.value =  "$" + formatNumberDec(VaffordCost,0,1);

}
}
}