code: function(e, cal) {
          Event.preventDefault(e);
          setTimeout(function() {
              cal.nextMonth();
              var navs = Dom.getElementsByClassName(cal.Style.CSS_NAV_RIGHT, "a", cal.oDomContainer);
              if (navs && navs[0]) {
                  try {
                      navs[0].focus();
                  } catch (ex) {
                      // ignore
                  }
              }
          }, 0);
      }
docs: The default event handler for clicks on the "Next Month" navigation UI
  
  @method doNextMonthNav
  @param {DOMEvent} e The DOM event
  @param {Calendar} cal A reference to the calendar