Browser detection

Browser Detection (source)
<script language="javascript"> <!-- version=parseInt(navigator.appVersion); browser="OTHER"; if(navigator.appName=='Netscape'){ browser='NS'+version;} if(navigator.appName=='Microsoft Internet Explorer') {browser='MSIE';} if(navigator.appVersion.indexOf('MSIE 3')>0) {browser='MSIE3'} if(browser=='MSIE3'){ alert('You have internet explorer 3.0'); //window.location='3.htm' } if(navigator.appVersion.indexOf('MSIE 4')>0) {browser='MSIE4'} if(browser=='MSIE4'){ alert('You have internet explorer 4.0'); //window.location='4.htm' } if(navigator.appVersion.indexOf('MSIE 5')>0) {browser='MSIE5'} if(browser=='MSIE5'){ alert('You have internet explorer 5.0'); //window.location='4.htm' } if(browser=='NS3'){ alert('You have netscape 3.0'); } if(browser=='NS4'){ alert('You have netscape 4.0'); document.write('You should switch to internet explorer. Netscape does not meet <br> the needs of the modern webmaster'); } if(browser=='OTHER'){ alert('What browser do you have?'); } //--> </script>