HTML page incompatible tips and jumps

<script>if (window. ActiveXObject)//Determine if the browser belongs to IE    {        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")         {           alert ("In order to ensure that you can browse the website of this website properly, We recommend that you use the IE7 or above version of IE browser or Google, Firefox and other non-IE kernel browser ");}     </script><!--[If IE 6]>   <script>        window.location.href = ' http://windows.microsoft.com/ Zh-cn/internet-explorer/download-ie ';   </script><! [endif]-->