我想在按钮下方放置一个下拉菜单。这是我的代码,您可以看到程序下的子菜单不完全位于程序按钮下。
这是我的 HTML 代码:
<!Doctype>
<html>
<head>
<title>HelpHelp | Home</title>
<link rel="stylesheet" type="text/css" href="main.css" />
</head>
<body>
<div id="banner">
<a href="index.html" title="Go Home"><img src="logo.psd" alt="" height="70px" /></a>
<h3>Debugging HTML Since 2012</h3>
</div>
<div id="nav">
<ul>
<li> <a href="index.html">Home</a> </li>
<li> <a href="about.html">About</a> </li>
<li> <a href="http://www.htmlhelp.cu.cc">Forum</a> </li>
<li> <a href="#">Code</a> </li>
<li> <a href="#">Programs</a>
<ul>
<li><a href="#">Windows</a></li>
<li><a href="#">Macintosh</a></li>
</ul>
</li>
<li> <a href="#">Tutorials</a> </li>
</ul>
</div> <!-- End Nav Div -->
</body>
</html>
这是我的 CSS 代码:
/* CSS Document */
body{
margin:0px;
background: -webkit-linear-gradient(#f1f0f0 0%, #dadada 100%);
}
#banner{
border-bottom:2px solid #000;
background: -webkit-linear-gradient(#6e90e6 0%, #77a3f4 100%);
height: 100px;
}
#banner img{
position: relative;
top:5px;
left: -10px;
}
#banner h3{
font-family: cursive;
position:absolute;
top: 0px;
left: 250px;
font-style: italic;
font-weight: bold;
font-size: 24px;
text-shadow: 1px 1px 1px #fff;
}
#nav{
border-bottom:1px solid #000;
padding:0px;
width:100%;
background: #ff8c00;
}
#nav ul{
list-style-type: none;
margin:0px auto;
text-align:center;
padding-left:20px;
position: relative;
}
#nav li{
display:inline-block;
padding:10px;
width:100px;
background:#ff8c00;
border-right:1px solid #fff;
}
#nav a{
padding:5px;
text-align: center;
background:#ff8c00;
color: #000;
text-decoration: none;
font-family: sans-serif;
font-size: 15px;
}
#nav a:hover{
border-radius: 5px;
box-shadow: -1px -1px 1px #000;
background:#e27c0;
padding-left:10px;
padding-right:10px;
}
#nav ul ul{
visibility: hidden;
position:absolute;
left:64%;
top: 37px;
padding: 0px;
border:1px solid #000;
border-top: 1px solid transparent;
}
#nav ul li ul li{
background: transparent;
float:none;
display:block;
border-right:none;
border-bottom:1px solid #fff;
}
#nav ul li:hover ul{
visibility: visible;
background: #ff8c00;
}
#about_title{
width:100%;
height:45px;
border-bottom:1px solid #bfbfbf;
}
#about_who{
width:250px;
padding:10px;
border: 1px solid#000000;
margin-left:15%;
position: relative;
top: 10px;
}
#about_what{
width:250px;
padding:10px;
border: 1px solid #000000;
margin-left:15%;
position: relative;
top: 10px;
}