高手帮下忙~~~代码就几行

Question

<script type="text/javascript">
var str=new Array("http://localhost/index.html ","http://localhost/name/index.html ","http://localhost/name/111/222/333/444/index.html ")
for(i=0;i<str.length;i++)
alert(str[i]);
</script>其实我是想过滤一些字符，alert结果分别为：
http://localhost
http://localhost/name
http://localhost/name代码该怎么写

Answer 1

  <script type="text/javascript">
  <!--
var str = ["http://localhost/index.html","http://localhost/name/index.html ","http://localhost/name/111/222/333/444/index.html"];
alert(str.join(",").match(/http:\/\/localhost(\/name)*/g));
  //-->
  </script>

Answer 2

你的意思是不是 如果
http://localhost 后面直接接/index.html就只需要http://localhost 
如果http://localhost 与 /index.html之间还有路径 就取http://localhost + 第一个路径比如http://localhost/srcOne/index.html===>http://localhost/srcOne
http://localhost/srctwo/srcthree/index.html====http://localhost/srctwo希望自己把问题想清楚再提问

Answer 3

  
<script language="javascript">
  $(function(){
var str=new Array("http://localhost/index.html ","http://localhost/name/index.html ","http://localhost/name/111/222/333/444/index.html ");
$.each(str,function(i){
alert(str[i].slice(0,str[i].lastIndexOf("/")));
});
  });
  </script>