/***************************************************************************************************
 * Formats the quantity with commas
 **************************************************************************************************/
function format_qty(qty)
{
	var buffer = '';
	eval('qty = \''+qty+'\';');
	var len = qty.length;
	for (i=len-3;i>0;i-=3)
	{
		if (i < len-4)
			buffer = ','+buffer;
		buffer = qty.substring(i,i+3)+buffer;
	}
	if (buffer != '')
		buffer = ','+buffer;
	var pos = len % 3;
	if (pos == 0)
		pos = 3;
	buffer = qty.substring(0,pos)+buffer;
	return buffer;
}