function updateCost(pc,nor)
{
	var pv = "p_" + pc;
	var price = document.getElementById(pv).value;
	var qv = "q_" + pc;
	var quantity = document.getElementById(qv).value;
	var cv = "c_" + pc;
	var cost = price * quantity;
	if(cost == 0)
	{
		document.getElementById(cv).innerHTML = " ";
	}
	else
	{
		document.getElementById(cv).innerHTML = cost.toFixed(2);
	}
	
	var total = 0;
	for(i=1;i<=nor;i++)
	{
		var pvt = "p_" + i;
		var pricet = document.getElementById(pvt).value;
		var qvt = "q_" + i;
		var quantityt = document.getElementById(qvt).value;
		var costt = pricet * quantityt;
		total += costt;
	}
	if(total == 0)
	{
		document.getElementById("total").innerHTML = "&nbsp;";
	}
	else
	{
		document.getElementById("total").innerHTML = total.toFixed(2);
	}	
}