js获取url的多个参数

url带参格式如下：

courseschedule_add.html?week=1&cousenum=1&semesterid=4

上代码：

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