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<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>本教程(w3big.com)</title> <script src="http://cdn.static.w3big.com/libs/jquery/1.10.2/jquery.min.js"> </script> <script> $(document).ready(function(){ $("#btn1").click(function(){ $("#box").animate({height:"300px"}); }); $("#btn2").click(function(){ $("#box").animate({height:"100px"}); }); }); </script> </head> <body> <button id="btn1">使用动画放大高度</button> <button id="btn2">重置高度</button> <div id="box" style="background:#98bf21;height:100px;width:100px;margin:6px;"> </div> </body> </html>