js 获取url链接里的参数

      function GetUrl() {
        var url = location.search; //获取url中"?"符后的字串 
        var request = new Object();
        if (url.indexOf("?") != -1) {
          var str = url.substr(1);
          strs = str.split("&");
          for (var i = 0; i < strs.length; i++) {
            request [strs[i].split("=")[0]] = unescape(strs[i].split("=")[1]);
          }
        }
        return request;
      }

retutn出来的request是个对象