ขอความช่วยเหลือเรื่องของการ Detect Shock wave ของ ie หน่อยค่ะ

<script type="text/javascript">
function MM_CheckFlashVersion(reqVerStr,msg){
  with(navigator){
    var isIE  = (appVersion.indexOf("MSIE") != -1 && userAgent.indexOf("Opera") == -1); 
    var isWin = (appVersion.toLowerCase().indexOf("win") != -1);
    if (!isIE || !isWin){  // boolean  = true / flase
      var flashVer = -1;
      if (plugins && plugins.length > 0){ 
        var desc = plugins["Shockwave Flash"] ? plugins["Shockwave Flash"].description : ""; 
        desc = plugins["Shockwave Flash 2.0"] ? plugins["Shockwave Flash 2.0"].description : desc; 
        if (desc == "") flashVer = -1;
        else{
          var descArr = desc.split(" ");
          var tempArrMajor = descArr[2].split(".");
          var verMajor = tempArrMajor[0];
          var tempArrMinor = (descArr[3] != "") ? descArr[3].split("r") : descArr[4].split("r");
          var verMinor = (tempArrMinor[1] > 0) ? tempArrMinor[1] : 0;
          flashVer =  parseFloat(verMajor + "." + verMinor);
        }
      }
      // WebTV has Flash Player 4 or lower -- too low for video
      else if (userAgent.toLowerCase().indexOf("webtv") != -1) flashVer = 4.0;

      var verArr = reqVerStr.split(",");
      var reqVer = parseFloat(verArr[0] + "." + verArr[2]);
  
  /*if (flashVer < reqVer){
        if (confirm(msg))
          window.location = "http://www.macromedia.com/shockwave/download/download.cgi?P1_Prod_Version=ShockwaveFlash";
      }*/
  
	if (flashVer < reqVer){
		document.getElementById("linkDownload").className = "";
	//alert(document.getElementById("linkDownload").className);
		}
	else{
		document.getElementById("flashMovie").className = "";
	//alert(document.getElementById("flashMovie").className);
		}
    }
	else document.getElementById("flashMovie").className = "";
  } 
}
</script>