var ospreyMenu = {
	activeItem: "mbHome",
	activateItem: function(id) {
		var item = document.getElementById(id);
		var oldItem = document.getElementById(this.activeItem);
		oldItem.className = oldItem.className.replace(/active/, "");
		var oldSectionId = this.activeItem.replace(/mb/, "cs");
		var oldSection = document.getElementById(oldSectionId);
		oldSection.className = oldSection.className.replace(/active/, "");
		item.className = item.className + " active";
		var newSection = document.getElementById(id.replace(/mb/,"cs"));
		newSection.className = newSection.className + " active";
		this.activeItem = id;
	}
};

function menuClick(id) {
	ospreyMenu.activateItem(id);
}