var pattern1 = RegExp(".product_id=(.*?)&.*"); var pattern2 = RegExp(".product_id=(.*?)"); if (pattern1.test(location.search)) var productID = location.search.replace(pattern1,"$1"); else var productID = location.search.replace(pattern2,"$1"); var link = ' Click here to see if this product fits your vehicle '; document.write(link); Plays ...