var flashChecker = function() {

                       var hasFlash = 0;　　　　 //是否安装了flash

                       var flashVersion = 0;　　 //flash版本    

                       if(document.all) {

                         var swf = new ActiveXObject('ShockwaveFlash.ShockwaveFlash');

                         if(swf) {

                           hasFlash = 1;

                           VSwf = swf.GetVariable("$version");

                           flashVersion = parseInt(VSwf.split(" ")[1].split(",")[0]);

                         }

                       } else {

                         if(navigator.plugins && navigator.plugins.length > 0) {

                           var swf = navigator.plugins["Shockwave Flash"];

                           if(swf) {

                             hasFlash = 1;

                             var words = swf.description.split(" ");

                             for(var i = 0; i < words.length; ++i) {

                               if(isNaN(parseInt(words[i]))) continue;

                               flashVersion = parseInt(words[i]);

                             }

                           }

                         }

                       }

                       return { f: hasFlash, v: flashVersion };

                     } 

 　　　　　　　　　　　　　　var fls = flashChecker();

                             var s = "";

                             if(!fls.f) {

                               if(confirm("您的浏览器未安装Flash插件，现在安装？")) {

                                 window.location.href = "http://get.adobe.com/cn/flashplayer/";

                               }

                             }