var coup1="SCOTT";
var coup2="GSTD";
var coup2="BULLDOG";


function CalculateOrder(form) {

 if (form.text1.value == coup1)
 {
 form.discount_rate.value = "30";
 form.discount_rate2.value = "30";
 form.on1.value = "Coupon";
 form.os1.value = "Discount 30%";
 }
   if (form.text1.value == coup2)
 {
 form.discount_rate.value = "20";
 form.discount_rate2.value = "20";
 form.on1.value = "Coupon";
 form.os1.value = "Discount 20%";
}
   if (form.text1.value == coup3)
 {
 form.discount_rate.value = "20";
 form.discount_rate2.value = "20";
 form.on1.value = "Coupon";
 form.os1.value = "Discount 20%";
}
}