function calculateLoan(){

	if (document.forms[0].PV.value == "" || document.forms[0].PV.value == 0) {
		alert("Please enter a value in Line #1");
		document.forms[0].PV.focus();
	} else if (document.forms[0].i.value == "") {
		alert("Please enter a value in Line #2");
		document.forms[0].i.focus();
	} else if (document.forms[0].N.value == "" || document.forms[0].N.value == 0) {
		alert("Please enter a value in Line #3");
		document.forms[0].N.focus();
	} else {
	
		var PV = stripNum(document.forms[0].PV.value);
		var i = stripNum(document.forms[0].i.value);
		var N = stripNum(document.forms[0].N.value);

		var time = Number(document.forms[0].time.selectedIndex);
		var mPMT = 0;
		var tPMT = 0;
		var tINT = 0;

		if (i >= 1.0) { i = i / 100;}
		i = i / 12;
	
		if ( time == 0 ){ N = N;}
		if ( time == 1 ){ N = N * 12;}

		var x = 1 + i;

   		mPMT = ( PV * Math.pow(x,N) ) / ( ( ( Math.pow(x,N) - 1 ) / i ) );
   		tPMT = mPMT * N;
   		tINT = tPMT - PV;

   		document.forms[0].mPMT.value = formatNumber((100 * mPMT)/ 100);
   		document.forms[0].tPMT.value = formatNumber((100 * tPMT)/ 100);
   		document.forms[0].tINT.value = formatNumber((100 * tINT)/ 100);
   	}
}

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 formatNumber(num) {

var isNeg=0;

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

    
	onum=Math.round(num*100)/100;
		
	integer=Math.floor(onum);

	if (Math.ceil(onum) == integer) {
		decimal="00";
	} else{
		decimal=Math.round((onum-integer)*100)
	}
	decimal=decimal.toString();
	if (decimal.length<2) decimal="0"+decimal;

	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;

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

	return finNum;
}

function noEntry(elem) {

eval("document.loan." + elem + ".focus();");

}