//NAVIGATION FUNCTIONS

function isset(object) {
	if (null == object) {
		return false;
	}
	if ("undefined" == typeof(object) ) {
		return false;
	}
	return true;
}

function showOfficeInfo(elementID) {
	var subnav_obj = $(elementID);
	if (isset(subnav_obj)) {
		toggleVisibilityElements(subnav_obj, elementID);
	}
}

function toggleVisibilityElements(object, elementID) {
	var offices = document.getElementsByClassName("office");
	Element.hide('officegeneral');

	for(var i=0;i<offices.length;i++) {
		if (offices[i].id == object.id) {
			Element.show(offices[i].id);
		} else {
			Element.hide(offices[i].id);
		}
	}
}

function initKaart() {
	var offices = document.getElementsByClassName("office");
	for(var i=0;i<offices.length;i++) {
		offices[i].hide();
	}
	Element.show('officegeneral');
}