var openedMenu = "";
function ShowMenu(id, xoff, yoff) {
	HideMenu();

	var el = document.getElementById(id);
	if(el) {
		var obj = document.getElementById('m'+id);
		el.style.left = xoff + "px";
		el.style.top = yoff + "px";
		el.style.visibility = "visible";
	}
	openedMenu = id;
}

function HideMenu() {
	if (openedMenu) if (document.getElementById(openedMenu)) document.getElementById(openedMenu).style.visibility = "hidden";
}

var openedSubMenu = "";
function ShowSubMenu(id, xoff, yoff) {
	HideMenu();

	var el = document.getElementById(id);
	if(el) {
		var obj = document.getElementById('s'+id);
		el.style.left = xoff + "px";
		el.style.top = yoff + "px";
		el.style.visibility = "visible";
	}
	openedSubMenu = id;
}

function HideSubMenu() {
	if (openedSubMenu) if (document.getElementById(openedSubMenu)) document.getElementById(openedSubMenu).style.visibility = "hidden";
}