检测浏览器版本并跳转

 var browser=navigator.appName;
    var b_version=navigator.appVersion;
    var version=b_version.split(";");    var trim_Version=version[1].replace(/[ ]/g,"");
    if(browser=="Microsoft Internet Explorer" && trim_Version=="MSIE6.0")
    {
        window.location.href="update.html";
    }
    else if(browser=="Microsoft Internet Explorer" && trim_Version=="MSIE7.0")
    {
        window.location.href="update.html";
    }