+function DB_get_userid_by_email_and_password($email,$password)
+{
+ $result = mysql_query("SELECT id FROM User WHERE email=".DB_quote_smart($email)." AND password=".DB_quote_smart($password));
+ $r = mysql_fetch_array($result,MYSQL_NUM);
+
+ if($r)
+ return $r[0];
+ else
+ return 0;
+}