Javascript 如何更改下拉列表的样式
你好。我有一个一分为二的导航。一个在右边,一个在左边。我想更改右侧下拉列表的位置,以便在此处显示导航的所有内容是我的代码Javascript 如何更改下拉列表的样式,javascript,css,html,Javascript,Css,Html,你好。我有一个一分为二的导航。一个在右边,一个在左边。我想更改右侧下拉列表的位置,以便在此处显示导航的所有内容是我的代码 <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 L
<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;
}
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;
}
塔纳昂LGU
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-
-
CSS:
标题{
高度:80px;
宽度:100%;
背景:-webkit线性梯度(160度,白色,橙色);/*用于Safari 5.1至6.0*/
背景:-o型线性梯度(180度,白色,橙色);/*用于Opera 11.1至12.0*/
背景:-moz线性渐变(180度,白色,橙色);/*适用于Firefox 3.6至15*/
背景:线性渐变(180度,白色,橙色);/*标准语法(必须是最后一个)*/}
#徽标{页边距顶部:13px;}
#菜单{
背景:#000;
宽度:100%;
高度:40px;
边界半径:3px;
浮动:左;
}
#菜单{
显示:无;
}
#菜单ul li:悬停>ul{
显示:块;
}
#菜单ul{
填充:0px;
边界半径:5px;
列表样式:无;
保证金:0;
位置:相对位置;
显示:块;
}
#菜单ul:之后{
内容:“;
明确:两者皆有;
显示:块;
}
#菜单ulli{
浮动:左;
}
#菜单:悬停{
颜色:#fff;
}
#菜单ul li:将鼠标悬停在a上{
背景:#fff;
颜色:#000;
}
#菜单ulli a{
显示:块;
填充:0 10px;
颜色:#FFF;
文字装饰:无;
线高:40px;
}
#菜单{
背景:#fff;
填充:0;
位置:绝对位置;
顶部:40px;
盒子阴影:0px 0px 9px rgba(0,0,0,0.15);
}
#菜单ul-li{
浮动:无;
位置:相对位置;
}
#菜单ul li a{
填充:15px 40px;
颜色:#fff;
宽度:150px;
高度:50px;
}
#菜单ul li a:悬停{
背景:#000;
颜色:#fff;
}
#最后的菜单{
浮动:对;
}
更新的小提琴:
<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;
}
在左侧下拉列表中添加了left:0
,在右侧下拉列表中添加了right:0
<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;
}
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;
}
在开始正文标记之前有一个关闭的导航标记。请解决这个问题,以便我们知道开始导航标签应该在哪里。