function formatCurrency(num) {
num = num.toString().replace(/\$|\,/g,'');
if(isNaN(num))
num = "0";
sign = (num == (num = Math.abs(num)));
num = Math.floor(num*100+0.50000000001);
cents = num%100;
num = Math.floor(num/100).toString();
if(cents<10)
cents = "0" + cents;
for (var i = 0; i < Math.floor((num.length-(1+i))/3); i++)
num = num.substring(0,num.length-(4*i+3))+','+
num.substring(num.length-(4*i+3));
return (((sign)?'':'-') + '$' + num + '.' + cents);
}

function ChangeDetailSubTotal(theform,theoption)
{
	var temp_sub_total=0;
	var temp_quantity=(theform.quantity[theform.quantity.selectedIndex].value);
	var temp_cost=(theform.orderdetailcost.value);
	
	if (temp_quantity==0)
	{
		alert("Setting the quantity to zero will remove this item from the cart");	
	}
	
	temp_sub_total=temp_quantity*temp_cost;
	
	document.getElementById(theoption).innerHTML=formatCurrency(temp_sub_total);
	
}

function ChangeDetailSaleTotal(theform,theoption)
{
	var temp_sub_total=0;
	var temp_quantity=(theform.quantity[theform.quantity.selectedIndex].value);
	var temp_cost=(theform.orderdetailsale.value);
	
	temp_sub_total=temp_quantity*temp_cost;
	
	document.getElementById(theoption).innerHTML=formatCurrency(temp_sub_total);
	
}