function validate(){

email			= document.Customer.elements[0].value;

// Advanced email validation...
var emailFilter=/^.+@.+\..{2,3}$/;
if (!(emailFilter.test(email))) 
  { 
  alert("Please enter a valid email address.\n\nExample: yourname@AOL.com");
  document.Customer.elements[0].focus();
  return false;
  }

return true;
}