<html>
<head>
<meta http-equiv="Content-Type" content="text/htmlcharset=UTF-8" />
<title>CSS+JavaScript三级折叠菜单</title>
<style>
*,body,ul,li,h1,h2 {
margin: 0
padding: 0
list-style: none
}
body {
font: 12px "宋体"
padding-top: 20px
}
#menu {
width: 200px
margin: auto
}
#menu h1 {
cursor: pointer
color: #FFF
font-size: 12px
padding: 5px 0 3px 10px
border: #C60 1px solid
margin-top: 1px
background-color: #F93
}
#menu h2 {
cursor: pointer
color: #777
font-size: 12px
padding: 5px 0 3px 10px
border: #E7E7E7 1px solid
border-top-color: #FFF
background-color: #F4F4F4
}
#menu ul {
padding-left: 15px
height: 100px
border: #E7E7E7 1px solid
border-top: none
overflow: auto
}
#menu ul li {
padding: 5px 0 3px 10px
}
.no {
display: none
}
</style>
<script language="JavaScript">
function ShowMenu(obj, noid) {
var block = document.getElementById(noid)
var n = noid.substr(noid.length - 1)
if (noid.length == 4) {
var ul = document.getElementById(noid.substring(0, 3)).getElementsByTagName("ul")
var h2 = document.getElementById(noid.substring(0, 3)).getElementsByTagName("h2")
for (var i = 0i <h2.lengthi++) {
h2[i].innerHTML = h2[i].innerHTML.replace("+", "-")
h2[i].style.color = ""
}
obj.style.color = "#FF0000"
for (var i = 0i <ul.lengthi++) {
if (i != n) {
ul[i].className = "no"
}
}
} else {
var span = document.getElementById("menu").getElementsByTagName("span")
var h1 = document.getElementById("menu").getElementsByTagName("h1")
for (var i = 0i <h1.lengthi++) {
h1[i].innerHTML = h1[i].innerHTML.replace("+", "-")
h1[i].style.color = ""
}
obj.style.color = "#0000FF"
for (var i = 0i <span.lengthi++) {
if (i != n) {
span[i].className = "no"
}
}
}
if (block.className == "no") {
block.className = ""
obj.innerHTML = obj.innerHTML.replace("-", "+")
} else {
block.className = "no"
obj.style.color = ""
}
}
</script>
</head>
<body>
<div id="menu">
<h1 onClick="javascript:ShowMenu(this,'NO0')">- 一级菜单A</h1>
<span id="NO0" class="no">
<h2 onClick="javascript:ShowMenu(this,'NO00')">- 一级菜单A_1</h2>
<ul id="NO00" class="no">
<li>一级菜单A_0</li>
<li>一级菜单A_1</li>
<li>一级菜单A_2</li>
<li>一级菜单A_3</li>
<li>一级菜单A_4</li>
<li>一级菜单A_5</li>
</ul>
<h2 onClick="javascript:ShowMenu(this,'NO01')">- 一级菜单A_2</h2>
<ul id="NO01" class="no">
<li>一级菜单A_0</li>
<li>一级菜单A_1</li>
<li>一级菜单A_2</li>
<li>一级菜单A_3</li>
<li>一级菜单A_4</li>
</ul>
<h2 onClick="javascript:ShowMenu(this,'NO02')">- 一级菜单A_3</h2>
<ul id="NO02" class="no">
<li>一级菜单A_0</li>
<li>一级菜单A_1</li>
<li>一级菜单A_2</li>
<li>一级菜单A_3</li>
<li>一级菜单A_4</li>
<li>一级菜单A_5</li>
<li>一级菜单A_6</li>
</ul>
<h2 onClick="javascript:ShowMenu(this,'NO03')">- 一级菜单A_4</h2>
<ul id="NO03" class="no">
<li>一级菜单A_0</li>
<li>一级菜单A_1</li>
<li>一级菜单A_2</li>
<li>一级菜单A_3</li>
<li>一级菜单A_4</li>
<li>一级菜单A_5</li>
<li>一级菜单A_6</li>
<li>一级菜单A_7</li>
</ul>
</span>
<h1 onClick="javascript:ShowMenu(this,'NO1')">- 二级菜单B</h1>
<span id="NO1" class="no">
<h2 onClick="javascript:ShowMenu(this,'NO10')">- 二级菜单B_1</h2>
<ul id="NO10" class="no">
<li>二级菜单B_0</li>
<li>二级菜单B_1</li>
<li>二级菜单B_2</li>
<li>二级菜单B_3</li>
<li>二级菜单B_4</li>
<li>二级菜单B_5</li>
<li>二级菜单B_6</li>
<li>二级菜单B_7</li>
</ul>
<h2 onClick="javascript:ShowMenu(this,'NO11')">- 二级菜单B_2</h2>
<ul id="NO11" class="no">
<li>二级菜单B_0</li>
<li>二级菜单B_1</li>
<li>二级菜单B_2</li>
<li>二级菜单B_3</li>
<li>二级菜单B_4</li>
<li>二级菜单B_5</li>
<li>二级菜单B_6</li>
<li>二级菜单B_7</li>
</ul>
</span>
<h1 onClick="javascript:ShowMenu(this,'NO2')">- 三级菜单C</h1>
<span id="NO2" class="no">
<h2 onClick="javascript:ShowMenu(this,'NO20')">- 三级菜单C_1</h2>
<ul id="NO20" class="no">
<li>三级菜单C_0</li>
<li>三级菜单C_1</li>
<li>三级菜单C_2</li>
<li>三级菜单C_3</li>
<li>三级菜单C_4</li>
<li>三级菜单C_5</li>
<li>三级菜单C_6</li>
<li>三级菜单C_7</li>
<li>三级菜单C_8</li>
<li>三级菜单C_9</li>
</ul>
<h2 onClick="javascript:ShowMenu(this,'NO21')">- 三级菜单C_2</h2>
<ul id="NO21" class="no">
<li>三级菜单C_0</li>
<li>三级菜单C_1</li>
<li>三级菜单C_2</li>
<li>三级菜单C_3</li>
<li>三级菜单C_4</li>
</ul>
</span>
<h1 onClick="javascript:ShowMenu(this,'NO3')">- 四级菜单D</h1>
<span id="NO3" class="no">
<h2 onClick="javascript:ShowMenu(this,'NO30')">- 四级菜单D_1</h2>
<ul id="NO30" class="no">
<li>四级菜单D_0</li>
<li>四级菜单D_1</li>
<li>四级菜单D_2</li>
<li>四级菜单D_3</li>
</ul>
<h2 onClick="javascript:ShowMenu(this,'NO31')">- 四级菜单D_2</h2>
<ul id="NO31" class="no">
<li>四级菜单D_0</li>
<li>四级菜单D_1</li>
<li>四级菜单D_2</li>
<li>四级菜单D_3</li>
<li>四级菜单D_4</li>
<li>四级菜单D_5</li>
</ul>
</span>
</div>
</body>
</html>
<a href="小菜单页面" target="left">大菜单</a><a href="文本页面" target="right">小菜单</a>
要用这样的方式打开新的页面，关键点在target这个值上面，表示你在哪个frame里打开新页面。
大致思路
左侧：菜单，给每个菜单设置id和onclick点击事件，onclick事件触发的函数假设写为display()
右侧：写个固定样式的div，id假设设置为board。
如果你的菜单内容在服务器
display()的实现如下
function display(){$.ajax({
type: "POST",
url: 菜单所请求的内容地址,
data: this.id等等相关的请求标志,
success: funtion(data){$('board').html(data)},//返回数据填充
dataType: dataType})
}
如果菜单内容写死在页面内
那么右侧：写和菜单数一样多的div，把所有的display属性设置为none
同时display()的实现如下
function display(){
$('#'+$(this).attr('rel')).style.display='block'
}
以上，伪代码，仅供参考
欢迎分享，转载请注明来源：内存溢出
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