var coup1="RINGAROUND1234";
var coup2="FFDOA";
var coup3="TWOFER";

function CalculateOrder(form) {

 if (form.dis.value == coup1)

 {

 form.discount_rate.value = "37.5";

 form.discount_rate2.value = "37.5";

 form.on0.value = "PROMO CODE";

 form.os0.value = "2 CYCLOPS FOR $50";
  
 }
 if (form.dis.value == coup2)

 {

 form.discount_rate.value = "30";

 form.discount_rate2.value = "30";

 form.on0.value = "PROMO CODE";

 form.os0.value = "30% OFF";
 
 }
   if (form.dis.value == coup3)

 {

 form.discount_rate.value = "45";

 form.discount_rate2.value = "45";

 form.on0.value = "TWOFER SPECIAL! Mantis Militia PROMO CODE";

 form.os0.value = "MT-2HC Class Act AND MT-3 Classik for $44.00! ";
 
 }
  
}