var coup1="GRAD";
var coup2="FRIEND";

function CalculateOrder(form) {
	if (form.text1.value.toUpperCase() == coup1)
 	{
		form.discount_amount.value = "5";
		form.discount_amount2.value = "5";
	}
	else if (form.text1.value.toUpperCase() == coup2)
	{
		form.discount_amount.value = "5";
		form.discount_amount2.value = "5";
	}
	else
	{
		form.discount_amount.value = "0";
		form.discount_amount2.value = "0";
		if(form.text1.value.length>0)
		{
			window.alert("Invalid Coupon Code");
		}
	}		
}