code: function(onHover) {
  			return function(picker, calendar, inst) {
  				if ($.isFunction(onHover)) {
  					var target = this;
  					var renderer = inst.options.renderer;
  					picker.find(renderer.daySelector + ' a, ' + renderer.daySelector + ' span').
  						hover(function() {
  							onHover.apply(target, [$(target).calendarsPicker('retrieveDate', this),
  								this.nodeName.toLowerCase() === 'a']);
  						},
  						function() { onHover.apply(target, []); });
  				}
  			};
  		}
docs: A function to call when a date is hovered.
  @callback CalendarsPickerOnHover
  @param date {CDate} The date being hovered or <code>null</code> on exit.
  @param selectable {boolean} <code>true</code> if this date is selectable, <code>false</code> if not.
  @example function showHovered(date, selectable) {
  $('#feedback').text('You are viewing ' + (date ? date.formatDate() : 'nothing'));
  } Add a callback when hovering over dates.
  Found in the <code>jquery.calendars.picker.ext.js</code> module.
  @memberof CalendarsPicker
  @param onHover {CalendarsPickerOnHover} The callback when hovering.
  @example onShow: $.calendarsPicker.hoverCallback(showHovered)