27-3b.js

java应用代码和章节代码。各种功能实现效果。很值

// Pass the name of a plug-in for this function to see
// if the plug-in is registered with this browser and
// that it is enabled for at least one MIME type of any kind.
function pluginIsReady(plug_in) {
 plug_in = plug_in.toLowerCase();
 for (var i = 0; i < navigator.plugins.length; i++) {
  if (navigator.plugins[i].name.toLowerCase().indexOf(plug_in) != -1) {
   for (var j = 0; j < navigator.plugins[i].length; j++) {
    if (navigator.plugins[i][j].enabledPlugin) {
     return true;
    }
   }
   return false;
  }
 }
 return false;
}