jQuery标签切换布局---tab

ul,li{
margin: 0;
padding: 0;
list-style: none;
}
li{
float: left;
background-color: #868686;
color: #fff;
padding: 5px;
margin-right: 2px;
border: 1px solid red;
}
.tabin{
background-color: #6e6e6e;
border: 1px solid #6e6e6e;
}
.contentfirst{
clear: both;
background-color: #6e6e6e;
color: #fff;
width: 300px;
height: 100px;
padding: 10px;
display: none;
}
.content{
display: block;
}