检测浏览器的js

 CheckBrowser.js
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<!--
if (window.navigator.userAgent.indexOf("MSIE")>=1)
{
    //ΪIE
    //setActiveStyleSheet("default.css");
}
else
{
    if (window.navigator.userAgent.indexOf("Firefox")>=1)
    {
        //ΪFirefox
        //alert("ʹõΪFirefox    ڼ⣬ʹIE");
        alert("The browser you use is Firefox.  Because of compatibility, please use IE.");
        location.href="javascript:window.close()";
    }
    else
    {
        //Ϊ
        //alert("ʹõIE    ڼ⣬ʹIE");
        alert("The browser you use is not IE. Because of compatibility, please use IE.");
        location.href="javascript:window.close()";
    }
}
//-->