创建 CSS3 下拉菜单

1. [图片] 菜单效果

2. [代码]menu.html

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
<head>
<link rel="stylesheet" href="css/style.css" type="text/css" media="all">
<title>CSS3 drop down menu #4</title>
</head>
<body>
<div class="example">
<ul class="nav">
<li><a href="http://www.script-tutorials.com/">Home</a></li>
<li><a href="http://www.script-tutorials.com/">Tutorials</a>
<ul class="subs">
<li><a href="http://www.script-tutorials.com/category/html-css/">HTML / CSS</a></li>
<li><a href="http://www.script-tutorials.com/category/jquery/">JS / jQuery</a></li>
<li><a href="http://www.script-tutorials.com/category/php/">PHP</a></li>
<li><a href="http://www.script-tutorials.com/category/mysql/">MySQL</a></li>
<li><a href="http://www.script-tutorials.com/category/xslt/">XSLT</a></li>
<li><a href="http://www.script-tutorials.com/category/ajax/">Ajax</a></li>
<li><a href="http://www.script-tutorials.com/category/html-css/">HTML / CSS</a></li>
</ul>
</li>
<li><a href="http://www.script-tutorials.com/category/resources/">Resources</a>
<ul class="subs">
<li><a href="http://www.script-tutorials.com/category/php/">PHP</a></li>
<li><a href="http://www.script-tutorials.com/category/mysql/">MySQL</a></li>
<li><a href="http://www.script-tutorials.com/category/xslt/">XSLT</a></li>
<li><a href="http://www.script-tutorials.com/category/ajax/">Ajax</a></li>
<li><a href="http://www.script-tutorials.com/category/html-css/">HTML / CSS</a></li>
</ul>
</li>
<li><a href="http://www.script-tutorials.com/about/">About</a></li>
<li><a href="http://www.script-tutorials.com/creating-css3-dropdown-menu-4/">Back</a></li>
</ul>
<div ></div>
</div>
</body>
</html>
3. [代码]style.css

/* demo page styles */
body {
background:#eee;
margin:0;
padding:0;
font-family: "Trebuchet MS",Arial,Helvetica,sans-serif;
}http://www.huiyi8.com/yanjiangzhici/
.example {演讲致辞
position:relative;
background:#fff url(../images/background.jpg);
width:520px;
height:382px;
border:1px #000 solid;
margin:20px auto;
padding:15px;
border-radius:3px;
-moz-border-radius:3px;
-webkit-border-radius:3px;
}

/* main menu styles */

.nav,.nav ul {
list-style:none;
margin:0;
padding:0;
}

.nav {
position:relative;
}

.nav ul {
height:0;
left:0;
overflow:hidden;
position:absolute;
top:46px;
}

.nav li {
float:left;
position:relative;
}

.nav li a {
-moz-transition:0.5s;
-o-transition:0.5s;
-webkit-transition:0.5s;
background-color:#7770B4;
border:1px solid #6E67A6;
color:#FFF;
display:block;
font-size:16px;
line-height:35px;
padding:5px 20px;
text-decoration:none;
transition:0.5s;
}

.nav li:hover > a {
background:#8CCA33;
border-color:#6E67A6;
color:#fff;
}

.nav li:hover ul.subs {
height:auto;
width:180px;
}

.nav ul li {
-moz-transition:0.5s;
-o-transition:0.5s;
-webkit-transition:0.5s;
opacity:0;
transition:0.5s;
width:100%;
}

.nav li ul li {
-moz-transition-delay:0s;
-o-transition-delay:0s;
-webkit-transition-delay:0s;
transition-delay:0s;
}

.nav li:hover ul li {
opacity:1;
-moz-transition-delay:0.5s;
-o-transition-delay:0.5s;
-webkit-transition-delay:0.5s;
transition-delay:0.5s;
}

.nav ul li a {
background:#7770B4;
border-color:#6E67A6;
color:#fff;
line-height:1px;
-moz-transition:1.5s;
-o-transition:1.5s;
-webkit-transition:1.5s;
transition:1.5s;
}

.nav li:hover ul li a {
line-height:35px;
}

.nav ul li a:hover {
background:#8CCA33;
background-image: -webkit-gradient(linear, 0% 0%, 0% 95%, from(rgba(255, 255, 255, 0.5)), to(rgba(255, 255, 255, 0)));
background-image: -moz-linear-gradient(-90deg, rgba(255, 255, 255, 0.5), rgba(255, 255, 255, 0));
background-image: -o-linear-gradient(-90deg,rgba(255,255,255,0.5),rgba(255,255,25,0));
}

4. [图片] background.jpg