js获取url参数方法

  _gup(name, url, encode) {
    if (!url) url = location.href;
    name = this.encrypt(name, encode);
    name = name.replace(/[\[]/, "\\[").replace(/[\]]/, "\\]");
    var regexS = "[\\?&]" + name + "=([^&#]*)";
    var regex = new RegExp(regexS);
    var results = regex.exec(url);
    return results === null ? null : this.decrypt(results[1],     encode);
  },
  // 取url参数，例如：gup('type', 'http://localhost:8080/demo/xxx?type=123');
  gup(name, url, encode) {
    var result = this._gup(name, url, encode);
    if (result === null) {
      return this._gup(name, url, false);
    }
    return result;
  },