纯CSS实现下拉菜单与JS交互示例

<html xmlns="http://www.w3.org/1999/xhtml" lang="zh-CN"> <head> <meta http-equiv="Content-Type" content="text/html; charset=gb2312" /> <title>css菜单演示</title> <style type="text/css"> <!-- *{margin:0;padding:0;border:0;} body { font-family: arial, 宋体, serif; font-size:12px; } #nav { line-height: 24px; list-style-type: none; background:#666; } #nav a { display: block; width: 80px; text-align:center; } #nav a:link { color:#666; text-decoration:none; } #nav a:visited { color:#666;text-decoration:none; } #nav a:hover { color:#FFF;text-decoration:none;font-weight:bold; } #nav li { float: left; width: 80px; background:#CCC; } #nav li a:hover{ background:#999; } #nav li ul { line-height: 27px; list-style-type: none;text-align:left; left: -999em; width: 180px; position: absolute; } #nav li ul li{ float: left; width: 180px; background: #F6F6F6; } #nav li ul a{ display: block; width: 156px;text-align:left;padding-left:24px; } #nav li ul a:link { color:#666; text-decoration:none; } #nav li ul a:visited { color:#666;text-decoration:none; } #nav li ul a:hover { color:#F3F3F3;text-decoration:none;font-weight:normal; background:#C00; } #nav li:hover ul { left: auto; } #nav li.sfhover ul { left: auto; } #content { clear: left; } --> </style>  </head> <body> <ul id="nav"> <li>产品介绍 <ul> <li>产品一</li> <li>产品一</li> <li>产品一</li> <li>产品一</li> <li>产品一</li> <li>产品一</li> </ul> </li> <li>服务介绍 <ul> <li>服务二</li> <li>服务二</li> <li>服务二</li> <li>服务二服务二</li> <li>服务二服务二服务二</li> <li>服务二</li> </ul> </li> <li>成功案例 <ul> <li>案例三</li> <li>案例</li> <li>案例三案例三</li> <li>案例三案例三案例三</li> </ul> </li> <li>关于我们 <ul> <li>我们四</li> <li>我们四</li> <li>我们四</li> <li>我们四111</li> </ul> </li> <li>在线演示 <ul> <li>演示</li> <li>演示</li> <li>演示</li> <li>演示演示演示</li> <li>演示演示演示</li> <li>演示演示</li> <li>演示演示演示</li> <li>演示演示演示演示演示</li> </ul> </li> <li>联系我们 <ul> <li>联系联系联系联系联系</li> <li>联系联系联系</li> <li>联系</li> <li>联系联系</li> <li>联系联系</li> <li>联系联系联系</li> <li>联系联系联系</li> </ul> </li> </ul> </body> </html>

纯CSS下拉菜单与JS交互示例

注意：若需引入外部JavaScript文件，代码执行前必须刷新页面。

<!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> <title>老Y天下-网页特效-导航菜单-漂亮的二级下拉菜单</title> <meta http-equiv="content-Type" content="text/html;charset=gb2312"> <!--把下面代码加到<head>与</head>之间--> <style type="text/css"> /* common styling */ /* set up the overall width of the menu div, the font and the margins */ .menu { font-family: arial, sans-serif; width:750px; margin:0; margin:50px 0; } /* remove the bullets and set the margin and padding to zero for the unordered list */ .menu ul { padding:0; margin:0; list-style-type: none; } /* float the list so that the items are in a line and their position relative so that the drop down list will appear in the right place underneath each list item */ .menu ul li { float:left; position:relative; } /* style the links to be 104px wide by 30px high with a top and right border 1px solid white. Set the background color and the font size. */ .menu ul li a, .menu ul li a:visited { display:block; text-align:center; text-decoration:none; width:104px; height:30px; color:#000; border:1px solid #fff; border-width:1px 1px 0 0; background:#c9c9a7; line-height:30px; font-size:11px; } /* make the dropdown ul invisible */ .menu ul li ul { display: none; } /* specific to non IE browsers */ /* set the background and foreground color of the main menu li on hover */ .menu ul li:hover a { color:#fff; background:#b3ab79; } /* make the sub menu ul visible and position it beneath the main menu list item */ .menu ul li:hover ul { display:block; position:absolute; top:31px; left:0; width:105px; } /* style the background and foreground color of the submenu links */ .menu ul li:hover ul li a { display:block; background:#faeec7; color:#000; } /* style the background and forground colors of the links on hover */ .menu ul li:hover ul li a:hover { background:#dfc184; color:#000; } </style> <!--[if lte IE 6]> <style type="text/css"> /* styling specific to Internet Explorer IE5.5 and IE6. Yet to see if IE7 handles li:hover */ /* Get rid of any default table style */ table { border-collapse:collapse; margin:0; padding:0; } /* ignore the link used by 'other browsers' */ .menu ul li a.hide, .menu ul li a:visited.hide { display:none; } /* set the background and foreground color of the main menu link on hover */ .menu ul li a:hover { color:#fff; background:#b3ab79; } /* make the sub menu ul visible and position it beneath the main menu list item */ .menu ul li a:hover ul { display:block; position:absolute; top:32px; left:0; width:105px; } /* style the background and foreground color of the submenu links */ .menu ul li a:hover ul li a { background:#faeec7; color:#000; } /* style the background and forground colors of the links on hover */ .menu ul li a:hover ul li a:hover { background:#dfc184; color:#000; } </style> <![endif]--> </head> <body> <!--把下面代码加到<body>与</body>之间--> <div class="menu"> <ul> <li>DEMOS <!--[if lte IE 6]> DEMOS <table><tr><td> <![endif]--> <ul> <li>zero dollars</li> <li>wrapping text</li> <li>styled form</li> <li>active focus</li> <li>shadow boxing</li> <li>image map</li> <li>fun backgrounds</li> <li>fade scrolling</li> <li>em sized images</li> </ul> <!--[if lte IE 6]> </td></tr></table>  <![endif]--> </li> <li>MENUS <!--[if lte IE 6]> MENUS <table><tr><td> <![endif]--> <ul> <li>spies menu</li> <li>vertical menu</li> <li>enlarging list</li> <li>link images</li> <li>non-rectangular</li> <li>jigsaw links</li> <li>circular links</li> </ul> <!--[if lte IE 6]> </td></tr></table>  <![endif]--> </li> <li>LAYOUTS <!--[if lte IE 6]> LAYOUTS <table><tr><td> <![endif]--> <ul> <li>Fixed 1</li> <li>Fixed 2</li> <li>Fixed 3</li> <li>Fixed 4</li> <li>minimum width</li> </ul> <!--[if lte IE 6]> </td></tr></table>  <![endif]--> </li> <li>BOXES <!--[if lte IE 6]> BOXES <table><tr><td> <![endif]--> <ul> <li>spies menu</li> <li>vertical menu</li> <li>enlarging list</li> <li>link images</li> <li>non-rectangular</li> <li>jigsaw links</li> <li>circular links</li> </ul> <!--[if lte IE 6]> </td></tr></table>  <![endif]--> </li> <li>MOZILLA <!--[if lte IE 6]> MOZILLA <table><tr><td> <![endif]--> <ul> <li>drop down menu</li> <li>cascading menu</li> <li>content:</li> <li>mozzie box</li> <li>rainbow box</li> <li>snooker cue</li> <li>target practise</li> <li>two tone headings</li> <li>shadow text</li> </ul> <!--[if lte IE 6]> </td></tr></table>  <![endif]--> </li> <li>EXPLORER <!--[if lte IE 6]> EXPLORER <table><tr><td> <![endif]--> <ul> <li>example one</li> <li>weft fonts</li> <li>vertical align</li> </ul> <!--[if lte IE 6]> </td></tr></table>  <![endif]--> </li> <li>OPACITY <!--[if lte IE 6]> OPACITY <table><tr><td> <![endif]--> <ul> <li>opaque colours</li> <li>opaque menu</li> <li>partial opacity</li> <li>partial opacity II</li> </ul> <!--[if lte IE 6]> </td></tr></table>  <![endif]--> </li> </ul> <!-- clear the floats if required --> <div class="clear"> </div> </div> </body> </html> 

注意：若需引入外部JavaScript文件，代码执行前必须刷新页面。