var viz_menu = [];

	function showMenu(m, level) {
		if (viz_menu == m) return;
		hideMenu(level);
		viz_menu[viz_menu.length] = m;
		menutitle = "top_" + m;
		dropshadow = m + "_shadow";
		dropshadow_side = dropshadow + "_s";

		Element.show(m);
		h=Element.getHeight(m);
		$(dropshadow_side).style.height = h + "px";
		l = Element.getStyle(m,'left');
		t = Element.getStyle(m,'top');
		if(l != null || t != null) {
			$(dropshadow).style.left = (parseInt(l)+3) + "px";
			$(dropshadow).style.top = t;
		}
		Element.show(dropshadow);
		if($(menutitle)) {
			$(menutitle).style.backgroundColor = '#ffc728';
		}
		Element.show('invisibleLyr');
	}

	function hideMenu() {
		level = (arguments.length == 1)? arguments[0]:1;
		if (viz_menu.length == 0) return;
		vm_length = viz_menu.length;
		while (level <= vm_length){
			m = viz_menu[viz_menu.length-1];
			viz_menu.length--;
			menutitle = "top_" + m;
			dropshadow = m + "_shadow";
			dropshadow_side = dropshadow + "_s";

			Element.hide(m);
			h=Element.getHeight(m);
			$(dropshadow_side).style.height = h + "px";
			l = Element.getStyle(m,'left');
			t = Element.getStyle(m,'top');
			if(l != null || t != null) {
				$(dropshadow).style.left = (parseInt(l)+3) + "px";
				$(dropshadow).style.top = t;
			}
			Element.hide(dropshadow);
			if($(menutitle)) {
				$(menutitle).style.backgroundColor = '';
			}
			vm_length = viz_menu.length;
		}

		if (viz_menu.length == 0) {
			Element.hide('invisibleLyr');
		}
	}

	function toggleBar(menutitle) {
		if($(menutitle)) {
			$(menutitle).style.backgroundColor = ($(menutitle).style.backgroundColor == '')? '#ffc728':'';
		}
	}

	function toggle_trigger(e) {
		node = e.parentNode;
		// toggle image
		imgnode = e.nextSibling;
		while (imgnode) {
			if(imgnode.nodeName == "IMG") {
				if(imgnode.src.indexOf("opened") > -1) {
					imgnode.src = imgnode.src.replace(/opened/, "closed");
				} else {
					imgnode.src = imgnode.src.replace(/closed/, "opened");
				}
			}
		
			imgnode = imgnode.nextSibling;
		}
		// toggle content
		while (node.nextSibling) {
			node = node.nextSibling;
			if(node.hasChildNodes() && Element.classNames(node) == "elementcollapsed") {
				Element.toggle(node);
				node = false;
			}
		}
	}
	function setActiveStyleSheet(title) {
	  var i, a, main;
		for (i=0; (a = document.getElementsByTagName("link")[i]); i++) {
			if (a.getAttribute("rel") && a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title")) {
	      a.disabled = true;
	      if(a.getAttribute("title") == title) a.disabled = false;
	    }
	  }
	}