<html>
<head>
<script>
onload = function(){
fr1 = document.getElementsByTagName('iframe')[0]
alert(fr1.src)
alert( window.frames[0].location.href )
}
</script>
</head>
<body>
1
<frameset style="border: none;">
<iframe name="frame_top" src="url1" marginwidth="0" marginheight="0" frameborder="0" />
<iframe name="frame_footer" src="url2" marginwidth="0" marginheight="0" scrolling="no" noresize="noresize" frameborder="0" />
</frameset>
</body>
</html>