美好的一天。我有一个分成两部分的导航。一个在右边，一个在左边。我想更改右侧下拉菜单的位置，以便在此处显示导航的所有内容是我的代码
HTML:
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<meta name="viewport" content="width=device-width,initial-scale=1.0" />
<title>Tanauan LGU </title>
<link href="styles.css" rel="stylesheet" type="text/css" />
</head>
<header>
<img src="estate_banner.png" id="logo">
</header>
<nav>
<div id="menu">
<ul>
<li><a href="#">item1</a> </li>
<li><a href="#">item1</a>
<ul>
<li><a href="#">item1</a> </li>
<li><a href="#">item1</a> </li>
<li><a href="#">item1</a> </li>
</ul>
</li>
<li><a href="#">item1</a> </li>
<li><a href="#">item1</a>
<ul>
<li><a href="#">item1</a> </li>
<li><a href="#">item1</a> </li>
<li><a href="#">item1</a> </li>
</ul>
</li>
<li class="last"><a href="#">Welcome Admin</a>
<ul>
<li><a href="#">Subitem One</a></li>
<li><a href="#">Subitem Two</a></li>
<li><a href="#">Subitem Three</a> </li>
</ul>
</li>
</ul>
</div>
</nav>
<body marginheight="0">
</body >
</html>
CSS:
header{
height:80px;
width:100%;
background: -webkit-linear-gradient(160deg,white, orange); /* For Safari 5.1 to 6.0 */
background: -o-linear-gradient(180deg,white, orange); /* For Opera 11.1 to 12.0 */
background: -moz-linear-gradient(180deg,white, orange); /* For Firefox 3.6 to 15 */
background: linear-gradient(180deg,white, orange); /* Standard syntax (must be last) */ }
#logo{margin-top:13px;}
#menu {
background:#000;
width:100%;
height:40px;
border-radius: 3px;
float:left;
}
#menu ul ul {
display: none;
}
#menu ul li:hover > ul {
display: block;
}
#menu ul {
padding: 0px;
border-radius: 5px;
list-style: none;
margin:0;
position: relative;
display: block;
}
#menu ul:after {
content:"";
clear: both;
display: block;
}
#menu ul li {
float: left;
}
#menu ul li:hover {
color:#fff;
}
#menu ul li:hover a {
background:#fff;
color: #000;
}
#menu ul li a {
display: block;
padding:0 10px;
color: #FFF;
text-decoration: none;
line-height:40px;
}
#menu ul ul {
background: #fff;
padding:0;
position: absolute;
top: 40px;
box-shadow: 0px 0px 9px rgba(0, 0, 0, 0.15);
}
#menu ul ul li {
float: none;
position: relative;
}
#menu ul ul li a {
padding: 15px 40px;
color: #fff;
width:150px;
height:50px;
}
#menu ul ul li a:hover {
background: #000;
color:#fff;
}
#menu ul li.last {
float:right;
}
最佳答案
更新 fiddle :http://jsfiddle.net/lotusgodkk/GCu2D/113/
向左下拉列表添加了 left:0，向右下拉列表添加了 right:0。
HTML:
<header>
<img src="estate_banner.png" id="logo" />
</header>
<nav>
<div id="menu">
<ul class="leftul">
<li><a href="#">item1</a>
</li>
<li><a href="#">item1</a>
<ul>
<li><a href="#">item1</a>
</li>
<li><a href="#">item1</a>
</li>
<li><a href="#">item1</a>
</li>
</ul>
</li>
<li><a href="#">item1</a>
</li>
<li><a href="#">item1</a>
<ul>
<li><a href="#">item1</a>
</li>
<li><a href="#">item1</a>
</li>
<li><a href="#">item1</a>
</li>
</ul>
</li>
<li class="last"> <a href="#">Welcome Admin</a>
<ul class="rightul">
<li><a href="#">Subitem One</a>
</li>
<li><a href="#">Subitem Two</a>
</li>
<li><a href="#">Subitem Three</a>
</li>
</ul>
</li>
</ul>
</div>
</nav>
CSS:
header {
height:80px;
width:100%;
background: -webkit-linear-gradient(160deg, white, orange);
/* For Safari 5.1 to 6.0 */
background: -o-linear-gradient(180deg, white, orange);
/* For Opera 11.1 to 12.0 */
background: -moz-linear-gradient(180deg, white, orange);
/* For Firefox 3.6 to 15 */
background: linear-gradient(180deg, white, orange);
/* Standard syntax (must be last) */
}
#logo {
margin-top:13px;
}
#menu {
background:#000;
width:100%;
height:40px;
border-radius: 3px;
float:left;
}
#menu ul ul {
display: none;
}
#menu ul li:hover > ul {
display: block;
}
#menu ul {
padding: 0px;
border-radius: 5px;
list-style: none;
margin:0;
position: relative;
display: block;
}
#menu ul:after {
content:"";
clear: both;
display: block;
}
#menu ul li {
float: left;
}
#menu ul li:hover {
color:#fff;
}
#menu ul li:hover a {
background:#fff;
color: #000;
}
#menu ul li a {
display: block;
padding:0 10px;
color: #FFF;
text-decoration: none;
line-height:40px;
}
#menu ul ul {
background: #fff;
padding:0;
position: absolute;
top: 40px;
box-shadow: 0px 0px 9px rgba(0, 0, 0, 0.15);
}
.rightul {
right:0;
}
.leftul>ul {
left:0;
}
#menu ul ul li {
float: none;
position: relative;
}
#menu ul ul li a {
padding: 15px 40px;
color: #fff;
width:150px;
heigh:50px;
}
#menu ul ul li a:hover {
background: #000;
color:#fff;
}
#menu ul li.last {
float:right;
}
关于javascript - 如何更改下拉菜单的样式，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/23668829/