function table_with_form($action = "", $header = array(), $data = array(), $u_id = "u_id")
 {
     $return = "<form action='{$action}' method='POST'>";
     $return .= "<table>";
     $return .= "<tr>";
     foreach ($header as $key => $value) {
         if ($key == $u_id) {
             continue;
         }
         $return .= "<td>" . $key . "</td>";
     }
     $return .= "</tr>";
     foreach ($data as $row) {
         $return .= "<tr>";
         foreach ($header as $key => $value) {
             if ($key == $u_id) {
                 continue;
             }
             if (strtolower($value) == "check") {
                 $return .= "<td>" . GuiHelper::checkbox("check[]", $row[$key], $row[$u_id]) . "</td>";
             }
             if (strtolower($value) == "text") {
                 $return .= "<td>" . $row[$key] . "</td>";
             }
         }
         $return .= "</tr>";
     }
     $return .= "</table>";
     $return .= GuiHelper::submit_button();
     $return .= "</form>";
     return $return;
 }