<form name="PrePage" method = "post" action = "https://Simplecheckout.authorize.net/payment/CatalogPayment.aspx"> <input type = "hidden" name = "LinkId" value ="9911ba9b-126b-44bb-ace2-577aa8ec431f" /> <input type = "image" src ="//content.authorize.net/images/buy-now-blue.gif" /> </form>