function menuChange(elementID) {
	var menu_span = null;
	if (document.getElementById) menu_span = document.getElementById("menu_span_" + elementID);
	else if (document.all) menu_span = document.all["menu_span_" + elementID];
	else if (document.layers) menu_span = document.layers["menu_span_" + elementID];

	if (menu_span) {
		if (menu_span.innerHTML == "+") menu_span.innerHTML = "-";
		else menu_span.innerHTML = "+";
	}
}

function menuShowHide(elementID) {
	var menu = null;
	if (document.getElementById) menu = document.getElementById("menu_" + elementID);
	else if (document.all) menu = document.all["menu_" + elementID];
	else if (document.layers) menu = document.layers["menu_" + elementID];

	if (menu) {
		if (menu.style.display == "none") {
			menu.style.display = "block";
			menuChange(elementID);
		} else {
			menu.style.display = "none";
			menuChange(elementID);
		}
	}
}