code: function(e) {
  
                      // Stores the `keycode` value in a local variable
                      var currentKey = self._keyMappings[e.keyCode],
  
                          keydownMethod = self._keydownMethods()[currentKey];
  
                      if(keydownMethod) {
  
                          keydownMethod();
  
                          if(self.options["keydownOpen"] && (currentKey === "up" || currentKey === "down")) {
  
                              self.open();
  
                          }
  
                      }
  
                      if(keydownMethod && currentKey !== "tab") {
  
                          e.preventDefault();
  
                      }
  
                  }
docs: `keydown` event with the `selectBoxIt` namespace.  Catches all user keyboard navigations