这篇文章主要介绍“用CSS实现水平下拉菜单”，在日常操作中，相信很多人在用CSS实现水平下拉菜单问题上存在疑惑，小编查阅了各式资料，整理出简单好用的操作方法，希望对大家解答”用CSS实现水平下拉菜单”的疑惑有所帮助！接下来，请跟着小编一起来学习吧！
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>CSS Menu - Horizontal</title>
<style type="text/css">
<!--
@import"dhtml-horiz.css";
-->
body {
margin: 0;
padding: 30px;
background: #FFF;
color: #666;
}
h2 {
font: bold 16px Arial, Helvetica, sans-serif;
}
p {
font: 11px Arial, Helvetica, sans-serif;
}
a {
color: #900;
text-decoration: none;
}
a:hover {
background: #900;
color: #FFF;
}
/*CSS Code for Menu Begin:*/
/* Root = Horizontal, Secondary = Vertical */
ul#navmenu {
margin: 0;
border: 0 none;
padding: 0;
width: 500px; /*For KHTML*/
list-style: none;
height: 24px;
}
ul#navmenu li {
margin: 0;
border: 0 none;
padding: 0;
float: left; /*For Gecko*/
display: inline;
list-style: none;
position: relative;
height: 24px;
}
ul#navmenu ul {
margin: 0;
border: 0 none;
padding: 0;
width: 160px;
list-style: none;
display: none;
position: absolute;
top: 24px;
left: 0;
}
ul#navmenu ul li {
float: none; /*For Gecko*/
display: block !important;
display: inline; /*For IE*/
}
/* Root Menu */
ul#navmenu a {
border: 1px solid #FFF;
border-right-color: #CCC;
border-bottom-color: #CCC;
padding: 0 6px;
float: none !important; /*For Opera*/
float: left; /*For IE*/
display: block;
background: #EEE;
color: #666;
font: bold 10px/22px Verdana, Arial, Helvetica, sans-serif;
text-decoration: none;
height: auto !important;
height: 1%; /*For IE*/
}
/* Root Menu Hover Persistence */
ul#navmenu a:hover,
ul#navmenu li:hover a,
ul#navmenu li.iehover a {
background: #CCC;
color: #FFF;
}
/* 2nd Menu */
ul#navmenu li:hover li a,
ul#navmenu li.iehover li a {
float: none;
background: #EEE;
color: #666;
}
/* 2nd Menu Hover Persistence */
ul#navmenu li:hover li a:hover,
ul#navmenu li:hover li:hover a,
ul#navmenu li.iehover li a:hover,
ul#navmenu li.iehover li.iehover a {
background: #CCC;
color: #FFF;
}
/* 3rd Menu */
ul#navmenu li:hover li:hover li a,
ul#navmenu li.iehover li.iehover li a {
background: #EEE;
color: #666;
}
/* 3rd Menu Hover Persistence */
ul#navmenu li:hover li:hover li a:hover,
ul#navmenu li:hover li:hover li:hover a,
ul#navmenu li.iehover li.iehover li a:hover,
ul#navmenu li.iehover li.iehover li.iehover a {
background: #CCC;
color: #FFF;
}
/* 4th Menu */
ul#navmenu li:hover li:hover li:hover li a,
ul#navmenu li.iehover li.iehover li.iehover li a {
background: #EEE;
color: #666;
}
/* 4th Menu Hover */
ul#navmenu li:hover li:hover li:hover li a:hover,
ul#navmenu li.iehover li.iehover li.iehover li a:hover {
background: #CCC;
color: #FFF;
}
ul#navmenu ul ul,
ul#navmenu ul ul ul {
display: none;
position: absolute;
top: 0;
left: 160px;
}
/* Do Not Move - Must Come Before display:block for Gecko */
ul#navmenu li:hover ul ul,
ul#navmenu li:hover ul ul ul,
ul#navmenu li.iehover ul ul,
ul#navmenu li.iehover ul ul ul {
display: none;
}
ul#navmenu li:hover ul,
ul#navmenu ul li:hover ul,
ul#navmenu ul ul li:hover ul,
ul#navmenu li.iehover ul,
ul#navmenu ul li.iehover ul,
ul#navmenu ul ul li.iehover ul {
display: block;
}
</style>
<script type="text/JavaScript">
navHover = function() {
var lis = document.getElementById("navmenu").getElementsByTagName("LI");
for (var i=0; i<lis.length; i++) {
lis[i].onmouseover=function() {
this.className+=" iehover";
}
lis[i].onmouseout=function() {
this.className=this.className.replace(new RegExp(" iehover\\b"), "");
}
}
}
if (window.attachEvent) window.attachEvent("onload", navHover);
</script>
</head>
<body>
<h2>CSS Menu - Horizontal</h2>
<hr />
<ul id="navmenu">
<li><a href="#">Blog</a></li>
<li><a href="#">Work +</a>
<ul>
<li><a href="#">Websites +</a>
<ul>
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</ul>
</li>
<li><a href="#">Pen and Ink</a></li>
<li><a href="#">Free Interfaces</a></li>
</ul>
</li>
<li><a href="#">Learn +</a>
<ul>
<li><a href="#">Fireworks +</a>
<ul>
<li><a href="#">aquaButton</a></li>
<li><a href="#">aquaButton2</a></li>
<li><a href="#">waterDrop</a></li>
<li><a href="#">lightFX</a></li>
<li><a href="#">lightFX2</a></li>
</ul>
</li>
<li><a href="#">CSS +</a>
<ul>
<li><a href="#">footerStick</a></li>
<li><a href="#">spriteNav</a></li>
<li><a href="#">@import</a></li>
</ul>
</li>
</ul>
</li>
<li><a href="#">Info</a></li>
<li><a href="#">Contact</a></li>
</ul>
</body>
</html>
到此，关于“用CSS实现水平下拉菜单”的学习就结束了，希望能够解决大家的疑惑。理论与实践的搭配能更好的帮助大家学习，快去试试吧！若想继续学习更多相关知识，请继续关注亿速云网站，小编会继续努力为大家带来更多实用的文章！
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