javascript 判断 flash 插件是否安装

<!-- 以下为判断是否安装flash的js -->
<script>
//Powered By smvv @hi.baidu.com/smvv21
function flashChecker()
{
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("您的浏览器还没有安装Flash插件，现在安装？")){
window.location.href = "http://get.adobe.com/cn/flashplayer/";
}
}
</script>