How to Load View mainFrame?

[eluser]Unknown[/eluser]
Hi all,

How to load file View using Frame (mainFrame), where having 3 frames, 'leftFrame', 'topFrame','mainFrame' by Controller in CI?

If I try ("404 Page not found"):

<frame src="<?php $this->load->view('left');?>" name="leftFrame" scrolling="auto" id="leftFrame" title="leftFrame" />
<frame src="<?php $this->load->view('main');?>" name="mainFrame" scrolling="auto" id="mainFrame" title="mainFrame" />

thank you.