sample callback function 

 1 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
 2         "http://www.w3.org/TR/html4/loose.dtd">
 3 <html>
 4 <head>
 5     <title>callbackTest</title>
 6 
 7     <script type="text/javascript">
 8         function main(callback){
 9             alert("i am main function");
10             alert("invoke callback function");
11             callback();
12         }
13 
14         function b(){
15             alert("i am callback function b");
16         }
17 
18         function c(){
19             alert("i am callback function c");
20         }
21 
22         function test(){
23             main(b);
24             main(c);
25         }
26     </script>
27 </head>
28 <body>
29 <button onclick="test()"> click me</button>
30 </body>
31 </html>

 

posted @ 2015-06-30 11:02  lynn_zhang  阅读(180)  评论(0)    收藏  举报