判断是否安装flash player及当前版本的JS代码

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");