DHTML Browser Detection Redirection

[mjance]

I'm trying to get this DHTML browser detection redirection script to work for
MSIE browsers >= 6 and Netscape Browsers >= 6. I am using MSIE 6 and Netscape 7.1 to test
these scripts under these conditions.

This is the original script, which is to be placed in the head section of the html document:

<script>

//Browser redirect Script- Dynamic Drive (www.dynamicdrive.com)
//For full source code, 100's more DHTML scripts, and Terms Of Use,
//visit dynamicdrive.com

var browser_type=navigator.appName
var browser_version=parseInt(navigator.appVersion)

//if NS 6
if (browser_type=="Netscape"&&browser_version>=5)
window.location.replace("http://mozilla.org")
//if IE 4+
else if (browser_type=="Microsoft Internet Explorer"&&browser_version>=4)
window.location.replace("http://microsoft.com")
//if NS4+
else if (browser_type=="Netscape"&&browser_version>=4)
window.location.replace("http://www.netscape.com")
//Default goto page (NOT NS 4+ and NOT IE 4+)
else
window.location="http://www.dynamicdrive.com"
</script>



This actually works. But when I change it to this...



<script>

//Browser redirect Script- Dynamic Drive (www.dynamicdrive.com)
//For full source code, 100's more DHTML scripts, and Terms Of Use,
//visit dynamicdrive.com

var browser_type=navigator.appName
var browser_version=parseInt(navigator.appVersion)

//if NS 6
if (browser_type=="Netscape"&&browser_version>=6) // Changed from >=5 to >= 6
window.location.replace("http://mozilla.org")
//if IE 4+
else if (browser_type=="Microsoft Internet Explorer"&&browser_version>=6) // Changed from >=4 to >=6
window.location.replace("http://microsoft.com")
//if NS4+
else if (browser_type=="Netscape"&&browser_version>=4)
window.location.replace("http://www.netscape.com")
//Default goto page (NOT NS 4+ and NOT IE 4+)
else
window.location="http://www.dynamicdrive.com"
</script>




... the first test condition goes to www.netscape.com (not mozilla.org) and the second test condition goes to the last condition (dynamicdrive.com)


Am I doing something wrong here? How do I get Netscape browsers >=6 and MSIE browsers >= 6 to go to the specified locations?


Thanks!