On IE document.getElementsByName won't work

I use this code:

<div name="1234">
   <img src="pic.gif" height="70" width="100" onMouseOver="clear('1234')">
</div> 

And:

function clear(element_name){
    document.getElementsByName(element_name)[0].innerHTML="";
}

It does work in Firefox and Opera, but doesn't work in IE 6.0 or IE 8.0, and probably not even in newer IE's.

What to do?