面包屑 CSS(合并小图标，减少链接请求数量)
关于css实现面包屑已经是一个典型例子了。不过今天还是与大家分享一下实现的原理。原理：每一段元素固定宽度并向左浮动，头尾突出部分相对父元素用相对定位固定位置，默认为同一颜色，高亮设置指定样式。
详解见下图：
合并小图标，减少链接请求数量
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>面包屑</title>
<style>
*{margin: 0px;padding: 0px;}
ul,ol,li,dl,dt,dd{list-style: none;}
.iCls{*zoom:1;}
.iCls:after{display:block; overflow:hidden;clear:both; height:0;visibility:hidden; content:".";}
.iBread li i,.iBread li em,.iBread li strong{
background-image:url("http://images.cnblogs.com/cnblogs_com/kuikui/354173/o_ibread.png");
background-repeat: none;
}
.iBread{
width: 910px;
margin: 20px auto;
_overflow: hidden;
}
.iBread ul{
border-radius: 6px;
overflow: hidden;
}
.iBread li{
position: relative;
float: left;
width: 292px;
height: 35px;
line-height: 35px;
color: #666666;
font-weight: bold;
background: #dfdfdf;
margin-right: 17px;
_margin-right: 16px;
text-indent: 80px;
}
.iBread li.last{
margin-right: 0px;
}
.iBread li i{
position: absolute;
right: -17px;
top: 0px;
z-index: 1;
display: block;
width: 17px;
height: 35px;
overflow: hidden;
background-position: -204px 0px;
}
.iBread li em{
display: none;
}
.iBread li strong{
position: absolute;
left: 30px;
top: 3px;
display: block;
width: 30px;
height: 30px;
overflow: hidden;
text-indent: -9999px;
margin-right: 20px;
}
.iBread li strong.one{
background-position: 0px 0px;
}
.iBread li strong.two{
background-position: -34px 0px;
}
.iBread li strong.three{
background-position: -67px 0px;
}
.iBread li strong.four{
background-position: -101px 0px;
}
.iBread li strong.five{
background-position: -134px 0px;
}
.iBread li.on{
z-index: 1;
color: #fff;
background-image:url("http://images.cnblogs.com/cnblogs_com/kuikui/354173/o_ibread.png");
background-repeat: repeat;
background-position: 0px -78px;
}
.iBread li.on i{
right: -19px;
width: 19px;
color: #fff;
background-position: -228px -41px;
}
.iBread li.on em,.iBread li.lastOn em{
position: absolute;
left: -17px;
top: 0px;
z-index: 1;
display: block;
width: 17px;
height: 35px;
overflow: hidden;
background-position: -204px -41px;
}
.iBread li.on strong.one{
background-position: 0px -41px;
}
.iBread li.on strong.two{
background-position: -34px -41px;
}
.iBread li.on strong.three{
background-position: -67px -41px;
}
.iBread li.on strong.four{
background-position: -101px -41px;
}
.iBread li.on strong.five{
background-position: -134px -41px;
}
.iBread li.last i{
background-position: -228px 0px;
}
.iBreadFour li{
width: 214.75px;
}
.iBreadFive li{
width: 168.4px;
}
</style>
</head>
<body>
<div class="iBread">
<ul class="iCls">
<li class="on">
<strong class="one">1</strong>
第一项
<i></i>
</li>
<li>
<strong class="two">2</strong>
第二项
<i></i><em></em>
</li>
<li class="last">
<strong class="three">3</strong>
第三项
<em></em>
</li>
</ul>
</div>
<div class="iBread iBreadFour">
<ul class="iCls">
<li class="on">
<strong class="one">1</strong>
第一项
<i></i>
</li>
<li>
<strong class="two">2</strong>
第二项
<i></i><em></em>
</li>
<li >
<strong class="three">3</strong>
第三项
<i></i><em></em>
</li>
<li class="last">
<strong class="four">4</strong>
第四项
<em></em>
</li>
</ul>
</div>
<div class="iBread iBreadFive">
<ul class="iCls">
<li >
<strong class="one">1</strong>
第一项
<i></i>
</li>
<li class="on" >
<strong class="two">2</strong>
第二项
<i></i><em></em>
</li>
<li >
<strong class="three">3</strong>
第三项
<i></i><em></em>
</li>
<li>
<strong class="four">4</strong>
第四项
<i></i><em></em>
</li>
<li class="last">
<strong class="five">5</strong>
第五项
<em></em>
</li>
</ul>
</div>
</body>
</html>