<script language="JavaScript">
<!--
    function whichBrs()
    {
    var agt=navigator.userAgent.toLowerCase();
        if (agt.indexOf("opera") != -1) return 'Opera';
        if (agt.indexOf("staroffice") != -1) return 'Star Office';
        if (agt.indexOf("beonex") != -1) return 'Beonex';
        if (agt.indexOf("chimera") != -1) return 'Chimera';
        if (agt.indexOf("netpositive") != -1) return 'NetPositive';
        if (agt.indexOf("phoenix") != -1) return 'Phoenix';
        if (agt.indexOf("firefox") != -1) return 'Firefox';
        if (agt.indexOf("safari") != -1) return 'Safari';
        if (agt.indexOf("skipstone") != -1) return 'SkipStone';
        if (agt.indexOf("msie") != -1) return 'Internet Explorer';
        if (agt.indexOf("netscape") != -1) return 'Netscape';
        if (agt.indexOf("mozilla/5.0") != -1) return 'Mozilla';
        if (agt.indexOf('\/') != -1)
        {
            if (agt.substr(0,agt.indexOf('\/')) != 'mozilla')
            {
                return navigator.userAgent.substr(0,agt.indexOf('\/'));
            } else
                return 'Netscape';
        } else if (agt.indexOf(' ') != -1)
                return navigator.userAgent.substr(0,agt.indexOf(' '));
        else
            return navigator.userAgent;
    }
    
    if (whichBrs() == "Internet Explorer")
        window.location="http://your.page.describing.how.good.firefox.is";
-->
</script>