Google Internal Site Search Modifications

I am using the following script:
<script type="text/javascript">
// Google Internal Site Search script- By JavaScriptKit.com [URL]
// For this and over 400+ free scripts, visit JavaScript Kit- [URL]
// This notice must stay intact for use
//Enter domain of site to search.
var domainroot="[URL]"

function Gsitesearch(curobj){
curobj.q.value="site:"+domainroot+" "+curobj.qfront.value
}
</script>
<form action="[URL]" method="get" onSubmit="Gsitesearch(this)">

<p>Search JavaScript Kit:<br />
<input name="q" type="hidden" />
<input name="qfront" type="text" style="width: 180px" /> <input type="submit" value="Search" /></p>
</form>
<p style="font: normal 11px Arial">This free script provided by<br />
<a href="[URL]">JavaScript Kit</a></p>

I want to modify the onSubmit event to also include this code:
window.open('', 'foo', 'width=450,height=300,status=yes,resizable=yes,scrollbars=yes')
But I am having difficulties. I would like for the search results page to be displayed in the new window.