<!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">
.top-nav
{
margin-top:50px;
font-size: 12px;
font-weight: bold;
list-style: none;
border-bottom: 8px solid #DC4E1B;
overflow: auto;
}
.top-nav li
{
float: left;
margin-right: 1px;
}
.top-nav li a
{
/*margin-top: 20px;*/
/*默认margin-top是0*/
/*响应margin-top：-20后，超出了浏览器的可视区域*/
line-height: 20px;
text-decoration: none;
background: #DDDDDD;
color: #666666;
display: block;
width: 80px;
text-align: center;
}
/*设置正常状态英文菜单隐藏*/
.top-nav li a span{
display:none;
}
/*鼠标移动到链接上面时将英文菜单显示*/
.top-nav li a:hover span{
display:block;
background:#DC4E1B;
color:white;
}
.top-nav li a:hover{
margin-top:-20px;
}
/*鼠标移动到链接上面时将中文菜单位置上移*/
</style>
</head>
<body>
<ul class="top-nav">
<li><a href="#">首页<span>Home</span></a></li>
<li><a href="#">课程大厅<span>Course</span></a></li>
<li><a href="#">学习中心<span>Learn</span></a></li>
<li><a href="#">关于我们<span>About</span></a></li>
</ul>
</body>
</html>
<!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">
.top-nav {
font-size: 12px;
font-weight: bold;
list-style: none;
}
.top-nav li {
float: left;
list-style: none;
margin-right: 1px;
}
.top-nav li a {
line-height: 20px;
text-decoration: none;
background: #DDDDDD;
color: #666666;
display: block;
width: 80px;
text-align: center;
}
.top-nav li a:hover {
background: #900;
color: #FFF;
}
.top-nav ul {
list-style: none;
display: none;
width: 80px;
padding: 0;
position: relative;
}
.top-nav li ul li ul {
position: absolute;
top: 0;
left: 80px;
}
/* 使用CSS设置鼠标移动到一级菜单时，二级菜单显示，三级菜单隐藏 */
.top-nav li:hover ul {
display: block;
}
.top-nav li:hover ul li ul {
display: none;
}
/* 使用CSS设置鼠标移动到二级菜单时，三级菜单显示 */
.top-nav li ul li:hover ul {
display: block;
}
</style>
<script type="text/javascript">
window.onload = function() {
//判断是否为IE浏览器
var isIF = !!window.ActiveXObject;
var isIE6 = isIE && !window.XMLHttpRequest;
if (isIE6) {
var Lis = document.getElementsByTagName("li");
for (var i = 0; i < Lis.length; i++) {
Lis[i].onmouseover = function() {
var u = this.getElementsByTagName("ul")[0];
//如果包含子菜单，就将子菜单显示
if (u != undefined) {
u.style.display = "block";
}
}
Lis[i].onmouseout = function() {
var u = this.getElementsByTagName("ul")[0];
//如果包含子菜单，就将子菜单隐藏
if (u != undefined) {
u.style.display = "none";
}
}
}
}
}
</script>
</head>
<body>
<ul class="top-nav">
<li><a href="#">慕课网首页</a>
<ul>
<li><a href="#">前端课程 +</a>
<ul>
<li><a href="#">javascript</a></li>
<li><a href="#">css</a></li>
<li><a href="#">jquery</a></li>
</ul>
</li>
<li><a href="#">手机开发</a>
<ul>
<li><a href="#">ios开发</a></li>
<li><a href="#">android开发</a></li>
<li><a href="#">WP开发</a></li>
</ul>
</li>
<li><a href="#">后台编程</a></li>
</ul>
</li>
<li><a href="#">课程大厅</a> </li>
<li><a href="#">学习中心</a>
<ul>
<li><a href="#">前端课程 </a>
<ul>
<li><a href="#">javascript</a></li>
<li><a href="#">css</a></li>
<li><a href="#">jquery</a></li>
</ul>
</li>
<li><a href="#">手机开发</a>
<ul>
<li><a href="#">ios开发</a></li>
<li><a href="#">android开发</a></li>
<li><a href="#">WP开发</a></li>
</ul>
</li>
<li><a href="#">后台编程</a></li>
</ul>
</li>
<li><a href="#">关于我们</a></li>
</ul>
</body>
</html>View Code
<!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">
.top-nav {
font-size: 14px;
font-weight: bold;
list-style: none;
}
.top-nav li {
float: left;
margin-right: 1px;
}
.top-nav li a {
line-height: 34px;
text-decoration: none;
background: #3f240e;
color: #fff;
display: block;
width: 80px;
text-align: center;
}
.top-nav ul {
list-style: none;
display: none;
padding: 0;
position: absolute;
height: 0;
overflow: hidden;
}
.top-nav li a:hover {
background: url(http://img.mukewang.com/5461b50d0001e28000010034.jpg) 0 0 repeat-x;
}
.note {
color: #3f240e;
display: block;
background: url(http://img.mukewang.com/5461b50d0001e28000010034.jpg) 0 0 repeat-x;
}
.corner {
display: block;
height: 11px;
background: url(http://img.mukewang.com/5461b5620001410d00170011.jpg) 31px 0 no-repeat;
}
</style>
<script type="text/javascript">
window.onload = function() {
var Lis = document.getElementsByTagName("li");
for (var i = 0; i < Lis.length; i++) {
//鼠标经过时的效果
Lis[i].onmouseover = function() {
var u = this.getElementsByTagName("ul")[0];
if (u != undefined) {
u.style.display = "block";
ChangeH(u.id, 1);
}
}
Lis[i].onmouseleave = function() {
var u = this.getElementsByTagName("ul")[0];
if (u != undefined) {
ChangeH(u.id, -1);
}
}
}
}
function ChangeH(id, count) {
// 根据ID找到ulList，同时得到其高度
var ulList = document.getElementById(id);
var h = ulList.offsetHeight;
h += count;
if (count > 0) {
if (h <= 42) {
// 将高度赋值给ulList，同时，不断调用本函数
ulList.style.height = h + "px";
setTimeout("ChangeH('" + id + "',1)", 10);
} else {
return;
}
} else {
if (h > 0) {
// 将高度赋值给ulList，同时，不断调用本函数
ulList.style.height = h + "px";
setTimeout("ChangeH('" + id + "',-1)", 10);
} else {
ulList.style.display = "none";
return;
}
}
}
</script>
</head>
<body>
<ul class="top-nav">
<li><a href="#"><span class="note">慕课网</span></a> </li>
<li><a href="#">课程大厅</a> </li>
<li><a href="#">学习中心</a>
<ul id="mnuUL">
<span class="corner"></span>
<li><a href="#">前端课程 </a></li>
<li><a href="#">手机开发</a> </li>
<li><a href="#">后台编程</a></li>
</ul>
</li>
<li><a href="#">关于我们</a></li>
</ul>
</body>
</html>View Code
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