js判断flashplayer是否已安装，并显示flash player版本

<script type="text/javascript">
//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) document.write("您安装了flash,当前flash版本为: "+fls.v+".x");
else document.write("您没有安装flash");
</script>