js判断当前浏览器是否flash源码实例

<script>
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>