<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title></title> <style type="text/css"> div#result{ width:300px; height:300px; background-color:red; } </style> <script src="js/jquery.js"></script> <script> $(function(){ $('#btnfadeIn').bind('click',function(){ $('#result').fadeIn(3000); }); $('#btnfadeOut').bind('click',function(){ $('#result').fadeOut(3000,function(){ alert('完成任务'); }); }); $('#btnfadeTo').bind('click',function(){ $('#result').fadeTo(3000,0.2); }); }) </script> </head> <body> <div id="result"></div> <hr /> <input type="button" id="btnfadeIn" value="fadeIn" /> <input type="button" id="btnfadeOut" value="fadeout" /> <input type="button" id="btnfadeTo" value="fadeTo" /> </body> </html>