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>
原文：http://www.cnblogs.com/lynnzhang/p/4609799.html