code: function Input(input, options) {
      this.main = input;
      this.$main = $(this.main);
  
      var defaultOption = {
          theme: window.bizui.theme,
          customClass: ''
      };
      this.options = $.extend(defaultOption, options || {});
      this.init(this.options);
  }
docs: Input
  @class
  @param {HTMLElement} input                 目标元素
  @param {Object}      [options]             参数
  @param {String}      [options.customClass] 自定义 class
  @param {Boolean}     [options.disabled]    禁用，默认 false
  @param {String}      [options.theme]       主题