var expandImage = new Image(9,9);
expandImage.src = "/images/menu_expand.gif";

var collapseImage = new Image(9,9);
collapseImage.src = "/images/menu_collapse.gif";

function toggleMenu(imageObj, itemID) {
	var contentObj = document.getElementById("menu_item_" + itemID + "_contents");
	if (contentObj.style.display != "block") {
		contentObj.style.display = "block";
		imageObj.src = collapseImage.src;
	} else {
		contentObj.style.display = "none";		
		imageObj.src = expandImage.src;
	}
}

function openItemContents(id) {
	var controlObj = document.getElementById("menu_control_" + id);
	if (controlObj) {
		controlObj.onclick();
	}
}

function openItemParent(itemID) {
	var parentID = itemID.substr(0, itemID.lastIndexOf("-"));
	if (parentID) {
		openItemContents(parentID);
		openItemParent(parentID);
	}
}