After having major problems with Netscape 4.7 and CSS I decided to try and re-direct them...this script will just load upmy background and freezes...any ideas why?

**URL has been changed to protect the innocent***




<script>
version=parseInt(navigator.appVersion);if (navigator.appVersion.indexOf('5.')>-1){version=5}; browser='OTHER'; if (navigator.appName=='Netscape'){browser='NS'+version;} if (navigator.appName=='Microsoft Internet Explorer'){browser='MSIE'+version;} if (navigator.appVersion.indexOf('MSIE 3')>0) {browser='MSIE3';} if(browser == 'NS5'){browser='NS6'};if (browser=='MSIE3') {window.location='http://www.accesscomm.ca/index.html'}if (browser=='MSIE4') {window.location='http://www.accesscomm.ca/index.html'}if (browser=='MSIE5') {window.location='http://www.accesscomm.ca/index.html'}if (browser=='MSIE6') {window.location='http://www.accesscomm.ca/testpage.html'}if (browser=='NS3') {window.location='http://www.accesscomm.ca/testpage.html'}if (browser=='NS4') {window.location='http://www.accesscomm.ca/testpage.html'}if (browser=='NS6') {window.location='http://www.accesscomm.ca/testpage.html'}if (browser=='OTHER') {window.location='http://www.accesscomm.ca/index.html'}
</script>

Major Netscape problem with CSS so Im trying to send them to another page