function roundOff(value)
{
	if (value == 0)
	{
		return "0";
		exit;
	}
 
	precision = 2;
	value = "" + value //convert value to string
	precision = parseInt(precision);
	var whole = "" + Math.round(value * Math.pow(10, precision));
	var decPoint = whole.length - precision;
 
	if(decPoint != 0)
	{
		result = whole.substring(0, decPoint);
		result += ".";
		result += whole.substring(decPoint, whole.length);
	}
	else
	{
		result = whole;
	}
 
	return result;
}

function CheckNull(value)
{
	if (value == "")
	{
		value = "0";
	}
 
	return value;
}

function calculate()
{
	document.BuyForm.cost1.value = 467.65;

 
	basicprice = roundOff(Number(CheckNull(document.BuyForm.qty1.value) * document.BuyForm.cost1.value)
	);
 
	document.BuyForm.desc.value = (document.BuyForm.qty1.value) + " x Enhance Media Conference Tickets, " ;
 
	document.BuyForm.cost.value = roundOff(Number(basicprice));
}