51help TIY
码：
<html> <head> <script type="text/javascript" src="../jquery/jquery.js" tppabs="http://www.51help.tk/jquery/jquery.js"></script> <script type="text/javascript"> $(document).ready(function(){ $("button").mousedown(function(){ $("div").slideToggle(); }); $("#mousePara").mouseover(function(){ $("button").mousedown(); }); }); </script> </head> <body> <div> <p>落。</p> <p>段落。</p> </div> <button>切换</button> <p id="mousePara">按钮的 mousedown 事件。</p> </body> </html>
查看结果: