function calculateShipping(item)
{
	var f = document.getElementById(item + "Form");

	var handling = "4.95";
	var total = f.quantity.value * f.amount.value;
	
	if (total > 99.99)
		handling = "12.50";
	else if (total > 74.99)
		handling = "10.50";
	else if (total > 49.99)
		handling = "8.50";
	else if (total > 29.99)
		handling = "6.25";

	f.handling.value = handling;
	document.getElementById(item + "Handling").innerHTML = "$" + handling;
}