012 清除与清空节点

1.介绍
2.程序
 1 <!DOCTYPE html>
 2 <html>
 3 <head>
 4 <meta charset="UTF-8">
 5 <title>Insert title here</title>
 6 <script type="text/javascript" src="jquery-3.2.1.min.js"></script>
 7 <script type="text/javascript">
 8     $(function(){
 9         //remove
10         $("#rl").remove();
11         
12         $("#city li").click(function(){
13             $(this).remove();
14         });
15         
16         //empty
17         alert(1);
18         $("#game").empty();
19     })
20 </script>
21 </head>
22 <body>
23     <p>你喜欢哪个城市?</p>
24     <ul id="city">
25         <li id="bj" name="BeiJing">北京</li>
26         <li>上海</li>
27         <li id="dj">东京</li>
28         <li id="se">首尔</li>
29     </ul><br>
30 
31     <p>你喜欢哪款单机游戏?</p>
32     <ul id="game">
33         <li id="rl">红警</li>
34         <li>实况</li>
35         <li>极品飞车</li>
36         <li>魔兽</li>
37     </ul>
38 </body>
39 </html>