爬山和爱情一样，爬得越高摔得越惨，同样，爱得越深，受伤的几率越大。人的一生全靠奋斗，唯有奋斗才能成功。让我们一起来奋斗吧！相信自己，我们会谱出一段美妙的音符，来唱出我们心中的那首歌！
复制代码
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>
<title></title>
<style type="text/css">
a
{
color:Black; /*--a标签的默认颜色为黑色--*/
text-decoration:none; /*--隐藏超链接的下划线--*/
}
a:hover
{
/**--当鼠标聚焦到a标签的时候文字显示为红色--*/
color:Red;
}
#div1 ul
{
/*--去掉文字前面的小圆点--*/
list-style-type:none;
}
#div1 ul li
{
border-style:solid;
border-width:1px;
padding:6px;
width:2.2cm;
text-align:center;
background-color:#eeeeee;
}
#div1 ul li ul
{
display:none; /*--默认隐藏一级菜单外的其他菜单--*/
}
#div1 ul li:hover ul
{
display:block;
position:relative;
left:50px;
height:0px;
top:-25px;
}
#div1 ul li:hover ul li ul /*--当鼠标聚焦到一级菜单下的li的时候，隐藏三级菜单--*/
{
display:none;
}
#div1 ul li ul li:hover ul /*--当鼠标聚焦到二级菜单下的li的时候，显示三级菜单,并设置菜单显示为block样式--*/
{
display:block;
}
#div1 ul li ul li:hover ul li ul /*--当鼠标聚焦到二级菜单下的li的时候，隐藏四级菜单--*/
{
display:none;
}
#div1 ul li ul li ul li:hover ul /*--当鼠标聚焦到三级菜单下的li的时候，显示四级菜单,并设置菜单显示为block样式--*/
{
display:block;
}
</style>
<script src="Scripts/jquery-1.4.1.js" type="text/javascript"></script>
<script type="text/javascript">
function config() {
if (confirm("你确定要联系我们吗？")) {
//window.location.href = 'http://www.baidu.com';
//location.href = "http://www.baidu.com";
//window.open('http://www.baidu.com');
if (confirm("能不能不要联系我们啊？") == true) {
return;
}
else {
window.open("http://www.baidu.com");
}
}
else {
return;
}
}
</script>
</head>
<body>
<div id="div1">
<ul>
<li><a rel="nofollow noopener noreferrer" href="#">中国</a>
<ul>
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<ul>
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<li><a rel="nofollow noopener noreferrer" href="#">开福区</a></li>
</ul>
</li>
<li><a rel="nofollow noopener noreferrer" href="#">衡阳</a>
<ul>
<li><a rel="nofollow noopener noreferrer" href="#">雁峰区</a></li>
<li><a rel="nofollow noopener noreferrer" href="#">朱辉区</a></li>
<li><a rel="nofollow noopener noreferrer" href="#">石鼓县</a></li>
<li><a rel="nofollow noopener noreferrer" href="#">祁东县</a></li>
<li><a rel="nofollow noopener noreferrer" href="#">南岳区</a></li>
</ul>
</li>
<li><a rel="nofollow noopener noreferrer" href="#">永州</a>
<ul>
<li><a rel="nofollow noopener noreferrer" href="#">零陵区</a></li>
<li><a rel="nofollow noopener noreferrer" href="#">冷水滩区</a></li>
<li><a rel="nofollow noopener noreferrer" href="#">东安县</a></li>
<li><a rel="nofollow noopener noreferrer" href="#">潇湘区</a></li>
</ul>
</li>
</ul>
</li>
<li><a rel="nofollow noopener noreferrer" href="#">北京</a>
<ul>
<li><a rel="nofollow noopener noreferrer" href="#">朝阳区</a></li>
</ul>
</li>
<li><a rel="nofollow noopener noreferrer" href="#">广东</a>
<ul>
<li><a rel="nofollow noopener noreferrer" href="#">广州</a>
<ul>
<li><a rel="nofollow noopener noreferrer" href="#">天河区</a></li>
<li><a rel="nofollow noopener noreferrer" href="#">越秀区</a></li>
<li><a rel="nofollow noopener noreferrer" href="#">海珠区</a></li>
</ul>
</li>
<li><a rel="nofollow noopener noreferrer" href="#">深圳</a>
<ul>
<li><a rel="nofollow noopener noreferrer" href="#">罗湖区</a></li>
<li><a rel="nofollow noopener noreferrer" href="#">福田区</a></li>
<li><a rel="nofollow noopener noreferrer" href="#">南山区</a></li>
<li><a rel="nofollow noopener noreferrer" href="#">盐田区</a></li>
<li><a rel="nofollow noopener noreferrer" href="#">宝安区</a></li>
<li><a rel="nofollow noopener noreferrer" href="#">龙岗区</a></li>
</ul>
</li>
<li><a rel="nofollow noopener noreferrer" href="#">东莞</a></li>
<li><a rel="nofollow noopener noreferrer" href="#">佛山</a></li>
</ul>
</li>
</ul>
</li>
<li><a rel="nofollow noopener noreferrer" href="#">美国</a>
<ul>
<li><a rel="nofollow noopener noreferrer" href="#">纽约</a>
<ul>
<li><a rel="nofollow noopener noreferrer" href="#">曼哈顿区</a></li>
<li><a rel="nofollow noopener noreferrer" href="#">皇后区</a></li>
</ul>
</li>
<li><a rel="nofollow noopener noreferrer" href="#">华盛顿</a></li>
<li><a rel="nofollow noopener noreferrer" href="#">芝加哥</a></li>
</ul>
</li>
<li><a rel="nofollow noopener noreferrer" href="#">俄罗斯</a>
<ul>
<li><a rel="nofollow noopener noreferrer" href="#">莫斯科</a></li>
<li><a rel="nofollow noopener noreferrer" href="#">圣彼得堡</a></li>
</ul>
</li>
<li><a rel="nofollow noopener noreferrer" href="#" onclick="config()">请联系我们</a></li>
</ul>
</div>
</body>
</html>
本文css中如何使用ul li ul li ul li ul li 如何实现四层级联菜单到此结束。天上最美的是星星，世间最美的是真情。小编再次感谢大家对我们的支持！
