1. html向applet传递参数：
>param name = STRINGNAME value = "String"<
>param name = NUMNAME value = number<
2. 使applet作为application运行
增加main方法，注意isStandalone的设置
3. 显示图片
Class metaObject = this.getClass();
java.net.URL url = metaObject.getResource("ca.gif");
ImageIcon imageIcon = new ImageIcon(url);
Image image = imageIcon.getImage();
4. 播放声音
AudioClip audioClip = Applet.newAudioClip(url);