使用Javascript检测Flash应用程序是否正确加载？

function isFlashInstalled() {
  for (var i = 0; i< navigator.plugins.length; i++) {
    if (navigator.plugins[i].name.indexOf('Shockwave Flash') !== -1) {
      return true;
    }
  }
  return false;
}

if (isFlashInstalled()) {
  console.log('Flash已安装');
} else {
  console.log('Flash未安装');
}

function getFlashVersion() {
  for (var i = 0; i< navigator.plugins.length; i++) {
    if (navigator.plugins[i].name.indexOf('Shockwave Flash') !== -1) {
      var version = navigator.plugins[i].description.split(' ')[2];
      return version;
    }
  }
  return '未安装';
}

console.log('Flash版本：' + getFlashVersion());

function isFlashSupported() {
  for (var i = 0; i< navigator.mimeTypes.length; i++) {
    if (navigator.mimeTypes[i].type === 'application/x-shockwave-flash') {
      return true;
    }
  }
  return false;
}

if (isFlashSupported()) {
  console.log('Flash支持');
} else {
  console.log('Flash不支持');
}

function isFlashLoaded() {
  try {
    var flash = new ActiveXObject('ShockwaveFlash.ShockwaveFlash');
    return true;
  } catch (e) {
    return false;
  }
}

if (isFlashLoaded()) {
  console.log('Flash已加载');
} else {
  console.log('Flash未加载');
}