竖向 下拉导航 单击打开 再单击关闭
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" />
<title>无标题文档</title>
<style type="text/css">
*{ margin:0px auto; padding:0px}
#menu{150px; height:300px; position:fixed; left:100px; top:20px}
.yiji{ 150px; height:35px; background-color:#63C; border:1px solid white; text-align:center; line-height:35px; vertical-align:middle; color:white; font-weight:bold}
#erji1{ 150px; display:none}
.xiang21{150px; height:35px; background-color:#F96; border:1px solid white; text-align:center; line-height:35px; vertical-align:middle; color:white; font-weight:bold}
#erji2{ 150px; display:none}
.xiang22{150px; height:35px; background-color:#F96; border:1px solid white; text-align:center; line-height:35px; vertical-align:middle; color:white; font-weight:bold}
#erji3{ 150px; display:none}
.xiang23{150px; height:35px; background-color:#F96; border:1px solid white; text-align:center; line-height:35px; vertical-align:middle; color:white; font-weight:bold}*/
</style>
</head>
<body>
<div id="menu">
<div class="yiji" onclick="showa('erji1')">
首页
</div>
<div id="erji1">
<div class="xiang21">首页1</div>
<div class="xiang21">首页2</div>
<div class="xiang21">首页3</div>
</div>
<div class="yiji" onclick="showa('erji2')">
产品中心
</div>
<div id="erji2">
<div class="xiang22">产品1</div>
<div class="xiang22">产品2</div>
<div class="xiang22">产品3</div>
</div>
<div class="yiji" onclick="showa('erji3')">
活动中心
</div>
<div id="erji3">
<div class="xiang23">活动1</div>
<div class="xiang23">活动2</div>
<div class="xiang23">活动3</div>
</div>
</body>
<script type="text/javascript">
function showa(d)
{
//找对应的二级菜单
var ej = document.getElementById(d);
if(ej.style.display=="block")
{
ej.style.display="none";
}
else
{
ej.style.display = "block";
}
}
</script>
</html>
效果如图：
横向 下拉导航 单击打开 再单击关闭
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" />
<title>无标题文档</title>
<style type="text/css">
*{ margin:0px auto; padding:0px}
#heng{ 700px; height:36px; border:1px solid #60F;}
.list{ float:left; 100px; height:36px; text-align:center; line-height:36px; vertical-align:middle; font-weight:bold}
.list:hover{ cursor:pointer; background-color:#63F; color:white;}
#ej1{ 100px; height:100px; position:relative; top:36px; left:-100px; background-color:#06C; display:none}
#ej2{100px; height:100px; position:relative; top:36px; left:-100px; background-color:#9C3;display:none}
#ej3{100px; height:100px; position:relative; top:36px; left:-100px; background-color:#F33;display:none}
#ej4{100px; height:100px; position:relative; top:36px; left:-100px; background-color:#696;display:none}
#ej5{100px; height:100px; position:relative; top:36px; left:-100px; background-color:#FF3;display:none}
.s{ widows:100px; height:30px; text-align:center; vertical-align:middle; line-height:30px;}
</style>
</head>
<body>
</div>
<div id="heng">
<div class="list" onmouseover="showc('ej1')" onmouseout="hidec('ej1')">首页</div>
<div style="float:left; 0px">
<div id="ej1">
<div class="s">首页1</div>
<div class="s">首页2</div>
<div class="s">首页3</div>
</div>
</div>
<div class="list" onmouseover="showc('ej2')" onmouseout="hidec('ej2')">产品中心</div>
<div style="float:left;0px">
<div id="ej2"></div>
</div>
<div class="list" onmouseover="showc('ej3')" onmouseout="hidec('ej3')">活动中心</div>
<div style="float:left;0px">
<div id="ej3"></div>
</div>
<div class="list" onmouseover="showc('ej4')" onmouseout="hidec('ej4')">新闻中心</div>
<div style="float:left;0px">
<div id="ej4"></div>
</div>
<div class="list" onmouseover="showc('ej5')" onmouseout="hidec('ej5')">联系我们</div>
<div style="float:left;0px">
<div id="ej5"></div>
</div>
</div>
<script type="text/javascript">
function showc(d)
{
var ej = document.getElementById(d);
ej.style.display="block";
}
function hidec(d)
{
var ej = document.getElementById(d);
ej.style.display="none";
}
</script>
</body>
</html>
效果如图：
