运用css,对于下拉菜单的制作

2018-06-22 05:05:58来源:未知 阅读 ()

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<html xmlns="http://www.w3.org/1999/xhtml" lang="en">

	<head>
		<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
		<title></title>
		<style type="text/css">
			* {
				margin: 0px;
				padding: 0px;
			}
			
			#nav {
				width: 500px;
				background-color: #737373;
				height: 40px;
				/*border-radius: 10px;*/
				position: relative;
				margin: 0px auto;
				top: 0px;
			}
			
			.nav-container {
				width: 100%;
				height: 40px;
				position: absolute;
			}
			
			.banner {
				float: left;
				text-align: center;
				height: 40px;
				width: 20%;
				line-height: 40px;
			}
			
			.banner:hover {
				background-color: #00BFFF;
				cursor: pointer;
			}
			
			div ul {
				list-style: none;
				/*display: none;*/
				background-color: blue;
				overflow: hidden;
				/*模拟height:auto时候的情况*/				
				max-height: 0px;
				transition: max-height 0.3s;
				/*多浏览器支持*/
				-moz-transition: height 1s;
				-webkit-transition: height 1s;
				-o-transition: height 1s;
			}
			
			.banner:hover ul {
				/*display: block;*/
				width: 100%;
				max-height: 160px;
			}
			
			div ul li {
				overflow: hidden;
			}
			
			div ul li:hover {
				background-color: red;
			}
		</style>
	</head>

	<body>
		<div class="nav-container">
			<div id="nav">
				<div id="nav-button-1" class="banner">第1个导航
					<ul>
						<li>1</li>
						<li>2</li>
						<li>3</li>
						<li>4</li>
					</ul>
				</div>
				<div id="nav-button-2" class="banner">第2个导航
					<ul>
						<li>1</li>
						<li>2</li>
						<li>3</li>
					</ul>
				</div>
				<div id="nav-button-3" class="banner">第3个导航
					<ul>
						<li>1</li>
						<li>2</li>
					</ul>
				</div>
				<div id="nav-button-4" class="banner">第4个导航
					<ul>
						<li>1</li>
						<li>2</li>
						<li>3</li>
						<li>4</li>
						<li>5</li>
					</ul>
				</div>
				<div id="nav-button-5" class="banner">第5个导航
					<ul>
						<li>1</li>
						<li>2</li>
						<li>3</li>
						<li>4</li>
						<li>5</li>
					</ul>
				</div>
			</div>
		</div>

	</body>

  

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