var flashVersion = 0;

function getFlashVersion() {   
  var latestFlashVersion = 8;
  var agent = navigator.userAgent.toLowerCase(); 
  if (agent.indexOf("mozilla/3") != -1 && agent.indexOf("msie") == -1)
    flashVersion = 0;
  if (navigator.plugins != null && navigator.plugins.length > 0) {
    var flashPlugin = navigator.plugins['Shockwave Flash'];
    if (typeof flashPlugin == 'object') { 
       for (var i = latestFlashVersion; i >= 3; i--) {
          if (flashPlugin.description.indexOf(i + '.') != -1) {
             flashVersion = i;
             break;
          }
       }
    }
  } else if (agent.indexOf("msie") != -1 && parseInt(navigator.appVersion) >= 4 && agent.indexOf("win")!=-1 && agent.indexOf("16bit")==-1) {
    var doc = '<scr' + 'ipt type="text/vbscript"\> \n';
    doc += 'On Error Resume Next \n';
    doc += 'Dim obFlash \n';
    doc += 'For i = ' + latestFlashVersion + ' To 3 Step -1 \n';
    doc += '   Set obFlash = CreateObject("ShockwaveFlash.ShockwaveFlash." & i) \n';
    doc += '   If IsObject(obFlash) Then \n';
    doc += '      flashVersion = i \n';
    doc += '      Exit For \n';
    doc += '   End If \n';
    doc += 'Next \n';
    doc += '</scr' + 'ipt\> \n';
    document.write(doc);
  } else if (agent.indexOf("webtv/2.5") != -1) flashVersion = 3;
   else if (agent.indexOf("webtv") != -1) flashVersion = 2;
  else flashVersion = null;
  return flashVersion;
}

//alert('Detected Flash ver.'+getFlashVersion());