Help w/ IE insertBefore problem needed

[delraydog]

I have the following chunk of code which works fine in FireFox but
throws an error when run in IE:

var body=this.myIFrame.contentWindow.document.body;
var div=document.createElement("div");
div.innerHTML="TEST";
body.insertBefore(div,body.firstChild);

The error is thrown on the insertBefore line. Any ideas?

Thanks,
Cliff