registration_action_CHANGE_TO.php

  if($_POST[email] != '')
  {
   	$p = db_query_row("select user_userID from student where email = '$_POST[email]'");
   	if($p[user_userID]) // taken
   	{
   		js_alert("Sorry, that email address has an account already. If you lost your password please go to the lost password page from the login screen.");
   		js_back();
   		die("Redirecting ...");
   	}
  }

registration_action_CURRENT.php

 	$p = db_query_row("select user_userID from student where email = '$_POST[email]'");
 	if($p[user_userID]) // taken
 	{



 		js_alert("Sorry, that email address has an account all ready. If you lost your password please goto the lost password page from the login screen.");
 		js_back();
 		die("Redirecting ...");
 	}