function validate(enquiry,EmailFrom) {
   var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
   var address = document.forms[enquiry].elements[EmailFrom].value;
   if(reg.test(address) == false) {
      alert('Please enter your correct email address so we can confirm your print sample request details.');
      return false;
   }
}