/*	Expanding Menus for Indexhibit
 *		uses jquery
 *
 *	Created by Harley Peddie  Aug 2010
 *  borrows some code from Ross Cairns (2008) Expanding Menu plugin
*/


function concertinaMenu(num) {
	var speed =1;
	
	var item_title = $("#menu ul").eq(num).children(":first");
	var items = $("#menu ul").eq(num).children().filter(function (index) { return index > 0; });
	
	/* hide items if not active */
	if (items.is(".active") == false) {
		items.hide();
	}else{items.addClass('open');}

	/* add click functions + pointer to title */
	item_title.css({cursor:"pointer"}).click(
		function () {
			
			var toopen = $(this).siblings();
			//alert(toopen.length)
			if($(this).siblings().not('.open').length > 0){ 
				var toclose = $("#menu li.open")
				toclose.slideToggle(speed)
				toclose.removeClass('open')
			}
			toopen.slideToggle(speed);
			toopen.toggleClass('open');
			
		}
	)
}