指向性导航

<style type="text/css">
ul{margin:0px; padding:0px; list-style:none;}
.wrap{960px; height:auto; line-height:30px; margin:100px auto 0;}
.step-case{height:40px;}
.step-case li{ float:left; margin:0px; 12.5%;position:relative; cursor:pointer;}
.step-case li span{display:block; background-color:#ccc; height:40px; line-height:40px; text-align:center; color:#fff; font-weight:bold;}
.step-case b{position:absolute; font-size:0px; line-height:0px; top:0px;}
.step-case .b-l{border-2px 2px 2px 0; border-style:dashed solid dashed dashed; border-color:transparent #ccc transparent transparent; height:36px; left:-2px;}
.step-case .b-r{border-2px 0 2px 2px; border-style:dashed dashed dashed solid; border-color:transparent transparent transparent #ccc; height:36px; right:-2px;}
.step-case .b-1{border-20px 0 20px 20px; border-style:solid dashed solid solid; border-color:#ccc transparent #ccc #ddd; left:-20px;}
.step-case .b-2{border-20px 0 20px 20px; border-style:dashed dashed dashed solid; border-color:transparent transparent transparent #ccc; left:-21px;}
/*当前状态*/
.step-case .s-cur span{background-color:orange;}
.step-case .s-cur .b-l{border-right-color:orange;}
.step-case .s-cur .b-r{border-left-color:orange;}
.step-case .s-cur .b-1{border-color:orange orange orange #FABF55;}
.step-case .s-cur .b-2{border-left-color:#FADBA5;}
/*当前状态后*/
.step-case .s-cur-next .b-2{border-color:transparent transparent transparent orange;}
/*完成的状态*/
.step-case .s-finish span{background-color:#FADBA5; color:#000;}
.step-case .s-finish .b-l{border-right-color:#FADBA5;}
.step-case .s-finish .b-r{border-left-color:#FADBA5;}
.step-case .s-finish .b-1{border-color:#FADBA5 #FADBA5 #FADBA5 #FABF55;}
.step-case .s-finish .b-2{border-left-color:#FADBA5;}
</style>
<script type="text/javascript">
window.onload = function(){
var step = document.getElementById("step"),li = step.getElementsByTagName("li");
for(var i = 0;i<li.length;i++){
//(function(i){
li[i].index = i;
li[i].onclick = function(){
var i = this.index;
for(var j = 0;j<i;j++){
li[j].className = "s-finish";
}
for(var j = li.length;j>i;){
li[--j].className = "";
if(j==i+1){
li[j].className = "s-cur-next";
}
}
this.className = "s-cur";
}

//})(i);
}
};
</script>
<div class="wrap">
<ul class="step-case" id="step">
<li class="s-finish"><span>第1步</span><b class="b-l"></b></li>
<li class="s-finish"><span>第2步</span><b class="b-1"></b><b class="b-2"></b></li>
<li class="s-finish"><span>第3步</span><b class="b-1"></b><b class="b-2"></b></li>
<li class="s-finish"><span>第4步</span><b class="b-1"></b><b class="b-2"></b></li>
<li class="s-cur"><span>第5步</span><b class="b-1"></b><b class="b-2"></b></li>
<li class="s-cur-next"><span>第6步</span><b class="b-1"></b><b class="b-2"></b></li>
<li><span>第7步</span><b class="b-1"></b><b class="b-2"></b></li>
<li><span>第8步</span><b class="b-1"></b><b class="b-2"></b><b class="b-r"></b></li>
</ul>
</div>