function _initItemNavigation(){

		var oDate = this._getDate();
		var sYyyyMMddHHmm = this._oFormatYyyyMMddHHmm.format(oDate.getJSDate(), true);
		var iIndex = 0;

		var oRootDomRef = this.$("times").get(0);
		var aDomRefs = this.$("times").children(".sapUiCalItem");

		for ( var i = 0; i < aDomRefs.length; i++) {
			var $DomRef = jQuery(aDomRefs[i]);
			if ($DomRef.attr("data-sap-time") === sYyyyMMddHHmm) {
				iIndex = i;
				break;
			}
		}

		if (!this._oItemNavigation) {
			this._oItemNavigation = new ItemNavigation();
			this._oItemNavigation.attachEvent(ItemNavigation.Events.AfterFocus, _handleAfterFocus, this);
			this._oItemNavigation.attachEvent(ItemNavigation.Events.FocusAgain, _handleFocusAgain, this);
			this._oItemNavigation.attachEvent(ItemNavigation.Events.BorderReached, _handleBorderReached, this);
			this.addDelegate(this._oItemNavigation);
			this._oItemNavigation.setDisabledModifiers({
				sapnext : ["alt"],
				sapprevious : ["alt"],
				saphome : ["alt"],
				sapend : ["alt"]
			});
			this._oItemNavigation.setCycling(false);
			this._oItemNavigation.setColumns(1, true);
		}
		this._oItemNavigation.setRootDomRef(oRootDomRef);
		this._oItemNavigation.setItemDomRefs(aDomRefs);
		this._oItemNavigation.setFocusedIndex(iIndex);
		this._oItemNavigation.setPageSize(aDomRefs.length); // to make sure that pageup/down goes out of month

	}
Overrides the applyFocusInfo in order to focus the given html element.
Focus handler does not work with DOM elements, but with UI5 controls only. That's why we need to take care that
when focus is being restored back (e.g. after rerendering), we focus the needed DOM element (in this case hour)

@param {object} oInfo the focus info
@returns {this} Reference to <code>this</code> for method chaining