1 <html> 2 <meta http-equiv="Content-Type" content="text/html; charset=gb2312" /> 3 <head> 4 <script type="text/javascript" src="js/jquery1.3.2.js"></script> 5 <script type="text/javascript"> 6 function showFile() { 7 if ($("#file").css("display") == "none") { 8 $("#file").css("display", "inline"); 9 $("#sign").text("-"); 10 } else { 11 $("#file").css("display", "none"); 12 $("#sign").text("+"); 13 } 14 ; 15 } 16 $(document).ready(function(){ 17 $("#showfile").click(showFile); 18 }) 19 </script> 20 </head> 21 <body> 22 <div id=showfile> <span id=sign>+</span> 信息中心 </div> 23 <div id=file style="display:none"> 24 <ul> 25 <li>1</li> 26 <li>2</li> 27 </ul> 28 </div> 29 </body> 30 </html>
原文：http://www.cnblogs.com/lihongtu/p/3924185.html