HELP! Need Browsercheck for IE5.5

[admin]

Can somebody help me with this:

I need to redirect IE 5.0 and lower browsers to one html-page, and IE 5.5 and higher browsers to another html-page.

How am I supposed to distinguish IE5.0 AND LOWER, from IE5.5 AND HIGHER in the Java script.

Here is the code that I磎 trying to use:
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<SCRIPT LANGUAGE="JavaScript">

<!-- This script and many more are available free online at -->
<!-- The JavaScript Source!! <!-- m --><a class="postlink" href="http://javascript.internet.com">http://javascript.internet.com</a><!-- m --> -->

<!-- Begin

var name = navigator.appName;
var vers = navigator.appVersion;
vers = vers.substring(0,1); // or 0,4 could return 4.5 instead of just 4

if (name == "Microsoft Internet Explorer")
url="msie";
else
url="netscape";
url += vers + ".html";
document.write('<center>');
document.write('<A HREF=http://www.webdeveloper.com/forum/archive/index.php/"' + url + '">Enter</A>');
document.write('</center>');

// You may make the redirection automatic by using this
// window.location=url;
// instead of the three document.write lines above

// End -->
</script>