首先给大家展示下效果图：
html代码部分：
代码如下：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta http-equiv="X-UA-Compatible" content="IE=EmulateIE7" /> <link href="css/lanrenzhijia.css" rel="stylesheet" type="text/css" /> <script language="javascript" type="text/javascript" src="js/jquery-1.4.2.js"></script> <script language="javascript" type="text/javascript" src="js/lanrenzhijia.js"></script> <title>jquery+css实现横向二级下拉菜单</title> </head> <body> <div id="menu"> <ul id="nav"> <li class="mainlevel"><span class="note">Chocolate Bar</span></li> <li class="mainlevel" id="mainlevel_01"><a href="#">browsers</a> <ul class="sub_nav_01"> <span class="Triangle_con"></span> <li><a href="#">firefox</a></li> <li><a href="#">chrome</a></li> <li><a href="#">opera</a></li> <li><a href="#">IE</a></li> <li><a href="#">Netscape</a></li> </ul> </li> <li class="mainlevel" id="mainlevel_02"><a href="#">html</a> <ul class="sub_nav_01"> <span class="Triangle_con"></span> <li><a href="#">html</a></li> <li><a href="#">xhtml</a></li> <li><a href="#">html5</a></li> <li><a href="#">css</a></li> <li><a href="#">TCP/IP</a></li> </ul> </li> <li class="mainlevel"><a href="#">xml</a> <ul class="sub_nav_01"> <span class="Triangle_con"></span> <li><a href="#">XSL</a></li> <li><a href="#">XSLT</a></li> <li><a href="#">XSL-FO</a></li> <li><a href="#">XPath</a></li> <li><a href="#">XQuery</a></li> <li><a href="#">XLink</a></li> <li><a href="#">XPointer</a></li> <li><a href="#">DTD</a></li> <li><a href="#">Schema</a></li> <li><a href="#">XForms</a></li> </ul> </li> <li class="mainlevel"><a href="#">browsers<em></em>scripting</a><!--input an em tag as a space,IE is gread need--> <ul class="sub_nav_01"> <span class="Triangle_con"></span> <li><a href="#">JavaScript</a></li> <li><a href="#">DHTML</a></li> <li><a href="#">VBScript</a></li> <li><a href="#">AJAX</a></li> <li><a href="#">jQuery</a></li> <li><a href="#">E4X</a></li> <li><a href="#">WMLScript</a></li> </ul> </li> <li class="mainlevel"><a href="#">server<em></em>scripting</a> <ul class="sub_nav_01"> <span class="Triangle_con"></span> <li><a href="#">SQL</a></li> <li><a href="#">ASP</a></li> <li><a href="#">ADO</a></li> <li><a href="#">PHP</a></li> </ul> </li> <li class="mainlevel"><a href="#">dot<em></em>net</a></li> <li class="mainlevel"><a href="#">multimedia</a> <ul class="sub_nav_01"> <span class="Triangle_con"></span> <li><a href="#">Media</a></li> <li><a href="#">SMIL</a></li> <li><a href="#">SVG</a></li> </ul> </li> </ul> </div> </body> </html>
以上代码很简单，jquery+css实现绚丽的横向二级下拉菜单-附源码下载就完成了，希望大家喜欢。
