function CalculateOrder(form)
{

if (form.os0.value == "8x10")
	form.amount.value = 125

if (form.os0.value == "16x12")
	form.amount.value = 249

if (form.os0.value == "20x16")
	form.amount.value = 325

if (form.os0.value == "20x24")
	form.amount.value = 450

}