//*******************************************
//Monthly Deposit Savings Calculator V1
//1998 Daniel C. Peterson ALL RIGHTS RESERVED
//Created: 08/21/1998
//Last Modified: 07/11/2002
//This script may not be copied, edited or reproduced
//without express written permission from
//Daniel C. Peterson of Web Winder Website Services
//For commercial use rates, contact:
//Web Winder Website Services
//P.O. Box 11
//Bemidji, MN  56619
//dan@webwinder.com
//Commercial User Licence #:5016-1145-144-1102
//Commercial Licence Date:2007-10-28
//*******************************************

function stripNum(num) {

   num=num.toString();


   var len = num.length;
   var rnum = "";
   var test = "";
   var j = 0;

   var b = num.substring(0,1);
   if(b == "-") {
      rnum = "-";
   }

   for(i = 0; i <= len; i++) {

      b = num.substring(i,i+1);

      if(b == "0" || b == "1" || b == "2" || b == "3" || b == "4" || b == "5" || b == "6" || b == "7" || b == "8" || b == "9" || b == ".") {
         rnum = rnum + "" + b;

      }

   }

   if(rnum == "" || rnum == "-") {
      rnum = 0;
   }

   rnum = Number(rnum);

   return rnum;

}

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 computeForm(form)  {

if(form.interest.value == "") {
   alert("Please enter the Interest Rate.");
   form.interest.focus();
   } else
     if(form.moAdd.value == "") {
       alert("Please enter the Monthly Addition.");
       form.moAdd.focus();
       }
       else
       if(form.payments.value == "") {
           alert("Please enter the Number of Years.");
           form.payments.focus();
           } else {


    var i = stripNum(form.interest.value);

    if (i >= 1.0) {
       i = i / 100
    }

    i /= 12;

   var ma = stripNum(form.moAdd.value);

   var Vprincipal = stripNum(form.principal.value);
   var prin = Vprincipal;

   var Vpayments = stripNum(form.payments.value);

   var pmts = Vpayments * 12;

   var count = 0;

   while(count < pmts) {

        newprin = eval(prin) + eval(ma);

        prin = eval(newprin * i) + eval(prin + ma);

        count = eval(count) + eval(1);

      }

   var Vfv = prin;

    form.fv.value = "$" + formatNumber(prin);

    var totinv = eval(count * ma) + eval(Vprincipal);

    var Vtotalint = eval(prin - totinv);

    form.totalint.value = "$" + formatNumber(Vtotalint);

//END NESTED IF TO CHECK FOR NON-NUMERIC ENTRIES
   }

}