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多级导航菜单
<html><head> <title>树状列表结构测试</title> <style type="text/css"> * { margin:0; padding:0; border:0; } body { font:12px/130% verdana, geneva, arial, helvetica, sans-serif, 宋体; } li { list-style:none; } .clearfix:after { content:" "; display:block; height:0; clear:both; visibility:hidden; } .clearfix { display:inline-block; } a:link { color:#000; text-decoration:none; } a:visited { color:#000; text-decoration:none; } a:hover { color:#000; text-decoration:none; } .menu { width:778px; height:26px; background:#fff; margin:0 auto; } .menusel { float:left; width:100px; position:relative; height:25px; background:#ddd; line-height: 25px; margin-left: 1px; *margin-left: 0px; _margin-left: -1px; } .menusel h2 { font-size:12px; } .menusel a { display: block; text-align:center; width:100px; border:1px solid #a4a4a4; height:25px; border-bottom:1px solid #a4a4a4; position:relative; z-index:2; } .menusel a:hover { border:1px solid #a4a4a4; border-bottom:1px dashed #eeeeee; position:relative; z-index:2; height:25px; } .ahover a { border-bottom:1px dashed #eeeeee; background:#eeeeee; } .position { position:absolute; z-index:1; } .menusel ul { width:125px; background:#eee; border:1px solid #a4a4a4; margin-top: -1px; position:relative; z-index:1; display:none; } .menusel .block { display:block; } .typeul li { border-bottom:1px dashed #a4a4a4; width:125px; position:relative; float:left; } .typeul li a { border:none; width:125px; } .typeul li a:hover { border:none; background:#ddd; } .typeul { margin-left:0; } .typeul ul { left:125px; top:0; position:absolute; } .fli { margin-left: -1px; border-left:#eeeeee solid 1px; } .menusel .lli { border:none; } </style> <script type="text/javascript"> document.execCommand("BackgroundImageCache", false, true); </script> <!-- IE6背景图片闪烁问题 --></head><body> <div class="menu"> <div id="menu1" class="menusel"> <h2> <a href="http://www.codefans.net/jscss/">菜单1</a></h2> <div class="position"> <ul class="clearfix typeul"> <li><a href="#">菜单选项1-2</a></li> <li><a href="#">菜单选项1-2</a> <ul> <li class="fli"><a href="#">菜单选项1-2-1</a></li> <li class="lli"><a href="#">菜单选项1-2-2</a></li> </ul> </li> <li><a href="http://www.codefans.net">菜单选项1-2</a></li> <li class="lli"><a href="#">菜单选项1-2</a></li> </ul> </div> <!-- position --> </div> <!-- menusel --> <div id="menu2" class="menusel"> <h2> <a href="#">菜单2</a></h2> <div class="position"> <ul class="clearfix typeul"> <li><a href="#">菜单选项2-2</a></li> <li><a href="#">菜单选项2-2</a> <ul> <li class="fli"><a href="#">菜单选项2-2-1</a></li> <li class="lli"><a href="#">菜单选项2-2-2</a> <ul> <li class="fli"><a href="#">菜单选项2-2-1</a></li> <li class="lli"><a href="#">菜单选项2-2-2</a> </li> </ul> </li> </ul> </li> <li><a href="#">菜单选项2-2</a></li> <li class="lli"><a href="#">菜单选项2-2</a></li> </ul> </div> <!-- position --> </div> <!-- menusel --> <div id="menu3" class="menusel"> <h2> <a href="#">菜单3</a></h2> <div class="position"> <ul class="clearfix typeul"> <li><a href="#">菜单选项3-2</a></li> <li><a href="#">菜单选项3-2</a> <ul> <li class="fli"><a href="#">菜单选项3-2-1</a></li> <li class="lli"><a href="#">菜单选项3-2-2</a> <ul> <li class="fli"><a href="#">菜单选项3-2-1</a></li> <li class="lli"><a href="#">菜单选项3-2-2</a> <ul> <li class="fli"><a href="#">菜单选项3-2-1</a></li> <li class="lli"><a href="#">菜单选项3-2-2</a></li> </ul> </li> </ul> </li> </ul> </li> <li><a href="#">菜单选项3-2</a></li> <li class="lli"><a href="#">菜单选项3-2</a></li> </ul> </div> <!-- position --> </div> <!-- menusel --> </div> <!-- menu --> <script type="text/javascript"> for (var x = 1; x < 4; x++) { var menuid = document.getElementById("menu" + x); menuid.num = x; type(); } function type() { var menuh2 = menuid.getElementsByTagName("h2"); var menuul = menuid.getElementsByTagName("ul"); var menuli = menuul[0].getElementsByTagName("li"); menuh2[0].onmouseover = show; menuh2[0].onmouseout = unshow; menuul[0].onmouseover = show; menuul[0].onmouseout = unshow; function show() { menuul[0].className = "clearfix typeul block" } function unshow() { menuul[0].className = "typeul" } for (var i = 0; i < menuli.length; i++) { menuli[i].num = i; var liul = menuli[i].getElementsByTagName("ul")[0]; if (liul) { typeshow() } } function typeshow() { menuli[i].onmouseover = showul; menuli[i].onmouseout = unshowul; } function showul() { menuli[this.num].getElementsByTagName("ul")[0].className = "block"; } function unshowul() { menuli[this.num].getElementsByTagName("ul")[0].className = ""; } } </script></body></html>
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