function rent_OnChange(fromLettingFee)
{
	var Cpppa = 1600;
	var VR = 5; //vacancy rate as percentage. ie. 5 = 5%
	
	if(fromLettingFee == 'true')
		document.forms[0].letting_fee.value  = (1 * document.forms[0].rent.value).toFixed(0);
		document.forms[0].reletting_fee.value  = (0.5 * document.forms[0].rent.value).toFixed(0);
		document.forms[0].letting_fee_f.value  = (1 * document.forms[0].rent.value).toFixed(0);
		document.forms[0].mgmt_fee_f.value  = (Cpppa/(52*((100-VR)/100))/(document.forms[0].rent.value)*100).toFixed(2);

	var sum = parseFloat(document.forms[0].letting_fee.value)
	+ parseFloat(document.forms[0].reletting_fee.value)
	+ (parseFloat(document.forms[0].rent.value)*52 * parseFloat(document.forms[0].mgmt_fee.value) / 100) 
	+ parseFloat(document.forms[0].lease_fee.value)  + (parseFloat(document.forms[0].admin_fee.value) * 12)
	+ (parseFloat(document.forms[0].postage_fee.value)*12)
	+ parseFloat(document.forms[0].annual_fee.value)
	+ parseFloat(document.forms[0].other_fee.value);

	var sum_f = parseFloat(document.forms[0].letting_fee_f.value)
	+ parseFloat(document.forms[0].reletting_fee_f.value)	
	+(parseFloat(document.forms[0].rent.value)*52*parseFloat(document.forms[0].mgmt_fee_f.value)/100)
	+parseFloat(document.forms[0].lease_fee_f.value)
	+(parseFloat(document.forms[0].admin_fee_f.value)*12)
	+(parseFloat(document.forms[0].postage_fee_f.value)*12)
	+parseFloat(document.forms[0].annual_fee_f.value) + parseFloat(document.forms[0].other_fee_f.value);

	//alert(sum);
	//alert(sum_f);

	var total = sum - sum_f;
	var total1 = total.toFixed(2);
	var floatNumber  = total1.substr(total1.length-3,3);
	var decimalNumber  = total1.substr(0,total1.length-3);
	var $num = "";

while(true)

{

$len = decimalNumber.length; //lenght of the no



    if($len == 0)

    {

    break;

    }

    if($len == 2)

    {

        if($num == "")

        $num = decimalNumber

        else

        {

        $num = decimalNumber + "," + $num;        

        }

        break;

    } 

    else if($len == 3)

    {

        if($num == "")

        $num = decimalNumber

        else

        {

        $num = decimalNumber.substr(0,1) + "," +decimalNumber.substr(1,3) +","+  $num;        

        }

        break;

    } 

    else if($len == 4)

    {

        if($num == "")

        $num = decimalNumber.substr(0,1)+ "," +decimalNumber.substr($len-3,3);

        else

        $num = decimalNumber.substr(0,1)+ "," +decimalNumber.substr($len-3,3) + "," +$num;

        

        break;

    } else

    {

        if($num != "")

			$num = decimalNumber.substr($len-3,3)+ "," + $num; 

        else

			$num = decimalNumber.substr($len-3,3); //get the last 3 di

        

        decimalNumber = decimalNumber.substr(0,$len-3); //get the last 3 digits

    }

    

}

	

//	if(!isNaN($num + floatNumber))

	//{

	    document.getElementById("total").innerHTML = "You Save $" + $num + floatNumber + " with Metro Realty!";

		//alert($num)

		//alert(floatNumber)

	    if(floatNumber == "NaN")

	        document.getElementById("total").innerHTML = " ";

	/*}

	else

	{

	    document.forms[0].total.value = "";

	} */

	

}