Detect Flash in browsers

flashdetect.js

function hasFlash(){
  var hasFlash = false;
  try {
      hasFlash = Boolean(new ActiveXObject('ShockwaveFlash.ShockwaveFlash'));
  } catch(exception) {
      hasFlash = ('undefined' != typeof navigator.mimeTypes['application/x-shockwave-flash']);
  }
  return hasFlash;
}