function check(formname)
{ 
          count=eval("document."+formname+".elements.length");

          for (i=0;i<count;i++)
          {
                   box=eval("document."+formname+".elements[i]");
                             if (!box.value )
                    {
                              alert('You haven\'t filled in ' + box.name + '!');
                              box.focus();
                              return false;
                    }
                    if (box.type!="submit" && !isInteger(box.value))
                    {
                              alert(box.name + ' should be numeric !');
                              box.focus();
                              return false;
                    }
          }
          return true;
}

function isInteger(s){
        var i;
         if(s >= 0)
                return true;
    for (i = 0; i < s.length; i++){
        // Check that current character is number.
        var c = s.charAt(i);
        if (((c < "0") || (c > "9"))) return false;
    }
    // All characters are numbers.
    return true;
}

function get_option()
{
          if(document.start.CalculationOption[0].checked==true)
          {
                    document.start.MonthLimit.value=0;
                    document.start.MonthlyPayment.disabled=false;
                    document.start.MonthlyPayment.focus();
                    document.start.MonthLimit.disabled=true;
                    document.start.MonthlyPayment.value='';
          }
          else if(document.start.CalculationOption[1].checked==true)
          {
                    document.start.MonthlyPayment.value=0;
                    document.start.MonthlyPayment.disabled=true;
                    document.start.MonthLimit.disabled=false;
                    document.start.MonthLimit.focus();
                    document.start.MonthLimit.value='';
          }
}

function MonthDisable()
{


          if(document.start.CalculationOption[0].checked==false && document.start.CalculationOption[1].checked==false)
          {
                    document.start.MonthlyPayment.disabled=true;
                    document.start.MonthLimit.disabled=true;
          }
}
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.purchase.value.length == 0 || form.purchase.value == 0) {
   alert("Please enter the original purchase price of the property.");
   form.purchase.focus();
} else
if(form.sale_price.value.length == 0) {
   alert("Please the selling price of the property.");
   form.sale_price.focus();
} else
if(form.fed_rate.value.length == 0 || form.fed_rate.value == 0) {
   alert("Please enter the federal capital gain tax rate percentage.");
   form.fed_rate.focus();
} else
if(form.state_rate.value.length == 0 || form.state_rate.value == 0) {
   alert("Please enter the state capital gain tax rate percentage.");
   form.state_rate.focus();
} else {

var Vpurchase = stripNum(form.purchase.value);
var Vimprove = stripNum(form.improve.value);
var Vdeprec = stripNum(form.deprec.value);
var Vsale_price = stripNum(form.sale_price.value);
var Vexpenses = stripNum(form.expenses.value);
var Vfed_rate = stripNum(form.fed_rate.value);
var Vstate_rate = stripNum(form.state_rate.value);
var Vloan_bal = stripNum(form.loan_bal.value);

var Vnab = eval(Vpurchase) + eval(Vimprove) - eval(Vdeprec);
form.nab.value = "$" + formatNumberDec(Vnab,2,1);

Vcap_gain = eval(Vsale_price) - eval(Vnab) - eval(Vexpenses);
form.cap_gain.value = "$" + formatNumberDec(Vcap_gain,2,1);

Vrecap = Vdeprec * .25;
form.recap.value = "$" + formatNumberDec(Vrecap,2,1);

if(Vfed_rate >= 1) {
   Vfed_rate /= 100;
}
Vfed_tax = (eval(Vcap_gain) - eval(Vdeprec)) * Vfed_rate;
form.fed_tax.value = "$" + formatNumberDec(Vfed_tax,2,1);

if(Vstate_rate >= 1) {
   Vstate_rate /= 100;
}
Vstate_tax = Vcap_gain * Vstate_rate;
form.state_tax.value = "$" + formatNumberDec(Vstate_tax,2,1);

Vtotal_tax = eval(Vrecap) + eval(Vfed_tax) + eval(Vstate_tax);
form.total_tax.value = "$" + formatNumberDec(Vtotal_tax,2,1);

Vgross = eval(Vsale_price) - eval(Vexpenses) - eval(Vloan_bal);
form.gross.value = "$" + formatNumberDec(Vgross,2,1);

Vnet = eval(Vgross) - eval(Vtotal_tax);
form.net.value = "$" + formatNumberDec(Vnet,2,1);

Vsale_equity = Vnet * 4;
form.sale_equity.value = "$" + formatNumberDec(Vsale_equity,2,1);

Vexchange_equity = Vgross * 4;
form.exchange_equity.value = "$" + formatNumberDec(Vexchange_equity,2,1);

   }
}

function clearResults(form) {

form.nab.value = "";
form.cap_gain.value = "";
form.recap.value = "";
form.fed_tax.value = "";
form.state_tax.value = "";
form.total_tax.value = "";


}