code: function(obj) {
  
              var self = this,
  
                  focusClass = self.focusClass = obj.focus,
  
                  hoverClass = self.hoverClass = obj.hover,
  
                  buttonClass = obj.button,
  
                  listClass = obj.list,
  
                  arrowClass = obj.arrow,
  
                  containerClass = obj.container,
  
                  openClass = self.openClass = obj.open;
  
              self.selectedClass = "selectboxit-selected";
  
              self.downArrow.addClass(self.selectBox.attr("data-downarrow") || self.options["downArrowIcon"] || arrowClass);
  
              // Adds the correct container class to the dropdown list
              self.dropdownContainer.addClass(containerClass);
  
              // Adds the correct class to the dropdown list
              self.dropdown.addClass(buttonClass);
  
              // Adds the default class to the dropdown list options
              self.list.addClass(listClass);
  
              // Maintains chainability
              return self;
  
          }
docs: _addClasses ----------- Adds SelectBoxIt CSS classes