6 html css menubar background-image
我想在每一端创建一个带有图像的导航栏,以使其成为真实的.
所以,我在下面创建了HTML和CSS,效果很好.我的菜单项目在ul/li列表中.
当我设置列表样式以将项目全部放在一行上时,两端的图像消失.那是怎么回事？我如何解决它？
罪魁祸首是浮动:左; 下面.
--- test.html ---
<html>
<head>
<link rel="stylesheet" href="test.css" type="text/css">
</head>
<body>
<div id="container">
<div id="header-usernav" class="span-6 last large">
<div id="header-usernav-leftside"><div id="header-usernav-rightside">
<ul>
<li>Register</li>
<li>Signin</li>
<li>Signout</li>
</ul>
</div></div>
</div>
</div>
</body>
</html>
--- test.CSS ---
#container #header-usernav {
background: url('http://www.webcredible.co.uk/i/bg-i-resources.gif');
height: 28px;
background-repeat: repeat;
}
#container #header-usernav-leftside {
background: url('http://www.webcredible.co.uk/i/nav-l-h.gif');
background-position: top left;
background-repeat: no-repeat;
}
#container #header-usernav-rightside {
background: url('http://www.webcredible.co.uk/i/nav-r-h.gif');
background-position: top right;
background-repeat: no-repeat;
}
#container #header-usernav ul {
list-style: none;
padding: 0;
margin: 0;
margin-left: 10px;
}
#container #header-usernav li {
float: left;
padding: 0;
margin: 0 0.2em;
}
图像不同,因此可以复制粘贴html/css来测试它.
这是怎么回事？我究竟做错了什么？
我建议添加overflow:hidden; (并缩放:1;保持IE6的跨浏览器兼容性)到容器div而不是添加清除div.清除会为您的源代码添加膨胀.
#container #header-usernav ul {
list-style: none;
padding: 0;
margin: 0;
margin-left: 10px;
overflow: hidden;
zoom: 1;
height: 28px; /* This is needed to ensure that the height of the rounded corners matches up with the rest of the bg.
}
只有浮动的孩子,你的外部容器将返回0px的高度.因此,您可以在浮动元素之后立即放置以下内容:
<div class="clear"></div>
并添加以下规则:
.clear { clear:both; }
例如:
<div id="container">
<div id="header-usernav" class="span-6 last large">
<div id="header-usernav-leftside">
<div id="header-usernav-rightside">
<ul>
<li>Register</li>
<li>Signin</li>
<li>Signout</li>
</ul>
<div class="clear"></div>
</div>
</div>
</div>
</div>