Javascript loading iframes

[iGuest 3]

Im getting this message

Line: 14Char: 3Error: 'document.getElementByID(...)' is null or not an objectCode: 0URL: http://forums.xisto.com/no_longer_exists/

when i try to run this code

<script type='text/javascript'>function setIframe() {	var url = window.location.href;	var i = url.indexOf("?i=");	if( i>-1 ) {  url = url.substr(i+3);  document.getElementById("content").src = url;	}	}window.onload = setIframe();</script>

with this url

http://forums.xisto.com/no_longer_exists/

to pull up this iframe

<iframe src="home.html" WIDTH=505 HEIGHT=420 name="body" id="content"></iframe>

with this source

full_site_part_1.html

Im putting my tutorials up on a site and i need to have a link that loads the iframe with the right content. PLEASE HELP!!

[iGuest 3]

ok fixed the javascript but still no go

<script language="JavaScript" type='text/javascript'>function setIframe() {	var url = window.location.href;	var i = url.indexOf("?i=");	if( i>-1 ) {  url = url.substr(i+3);  document.getElementById("content").src = url;	}	}window.onload = "setIframe()";</script>