xxxxxxxxxx<html><head><meta charset="utf-8"> <title>编程狮</title> <script src="https://cdn.staticfile.org/jquery/1.10.2/jquery.min.js"></script><script>$(document).ready(function(){ $("#btn1").click(function(){ $("#box").animate({opacity:"0"}); }); $("#btn2").click(function(){ $("#box").animate({opacity:"1"}); });});</script></head><body> <button id="btn1">改变透明度</button> <button id="btn2">重置透明度</button> <div id="box" style="background:#98bf21;height:100px;width:100px;margin:6px;"> </div></body></html>