JS 获取上一层目录

派生到我的代码片

    <script type="text/javascript">  
      //返回当前工作目录  
      function GetCurrDir(){  
        var pathName = window.location.pathname.substring(1);   
        var DirName = pathName == '' ? '' : pathName.substring(0, pathName.lastIndexOf('/'));   
        var reg=new RegExp("%20","g");  
        return DirName.replace(reg, " ");//替换空格  
        }  
    </script>