左侧与顶部导航的实现
左侧导航
<!doctype html>
<html>
<head>
<title>左侧导航</title>
/*<link rel ="shortcut icon" type="images/x-icon" href="2.jpg" >
用于改变图标*/
<style>
*{margin:0;padding:0;}
ul{
position:relative;
margin:100px;
width:250px;
list-style:none;
border:1px solid red;
}
ul li{
height:40px;
line-height:40px;
font-size:14px;
font-size:#ccc;
background:rgba(0,0,255,0.5);
text-indent:lem;
}
ul li:hover{/*鼠标上去之后的操作*/
background:red;
}
ul li:hover div{
display:block;
}
ul li div{
display:none;/**/
position:absolute;
top:0px;
left:250px;
height:600px;
width:600px;
background:rgb(0,255,0);
}
</style>
</head>
<body>
<ul>
<li>1<div>
1
</div></li>
<li>2<div>
2
</div></li>
<li>3<div>
3
</div></li>
<li>4<div>
4
</div></li>
<li>5<div>
5
</div></li>
<li>6<div>
6
</div></li>
</ul>
</body>
</html>
顶部导航
<!doctype html>
<html>
<head>
<title>顶部导航</title>
<style>
*{margin:0;padding:0;}
ul{
margin:100px;
height:40px;
line-height:40px;
width:600px;
list-style:none;
border:1px solid red;
}
ul li{
float:left;
position:relative;
width:100px;
font-size:14px;
font-size:#ccc;
background:rgba(0,0,255,0.5);
text-indent:center;
}
ul li:hover{/*鼠标上去之后的操作*/
background:red;
}
ul li:hover div{
display:block;
}
ul li div{
display:none;/**/
position:absolute;
top:90px;
left:0px;
height:300px;
width:100px;
background:rgb(0,255,0);
}
ul li div:after{
position:absolute;
top:-50px;
left:0px;
content:"";
width:0px;
height:0px;
border:50px solid transparent; /*transparent透明*/
border-bottom-color:red;
}
</style>
</head>
<body>
<ul>
<li>1<div>
1
</div></li>
<li>2<div>
2
</div></li>
<li>3<div>
3
</div></li>
<li>4<div>
4
</div></li>
<li>5<div>
5
</div></li>
<li>6<div>
6
</div></li>
</ul>
</body>
</html>
