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>
