ThinkPHP后台首页index使用frameset时的注意事项分析

<?php
 class IndexAction extends Action{
  public function index(){
   $this->display();
  }
  public function (){
   $this->display();
  }
  public function left(){
   $this->display();
  }
  public function right(){
   $this->display();
  }
 }
?>

 <frameset rows="20%,">
  <frame src="__URL__/" name="">
  <frameset cols="20%,">
   <frame src="__URL__/left" name="left">
   <frame src="__URL__/right" name="right">
  </frameset>
 </frameset>