var OpenContainer = null;
var OpenMenus = null;
var HideMenuTimer = null;

function MenuStartTimeout(hideTimeout) {
	HideMenuTimer = setTimeout("MenuHideMenus()", hideTimeout);	
}

function MenuHideMenus() {
	MenuResetTimeout();
	if(OpenContainer) {
		var c = document.getElementById(OpenContainer);
		c.style.visibility = "inherit";
		OpenContainer = null;
	}
	if( OpenMenus ) {
		for(var i in OpenMenus) {
			var m = document.getElementById(OpenMenus[i]);
			m.style.visibility = "hidden";			
		}
		OpenMenus = null;
	}
}

function MenuHideSubmenus(menuName) {
	if( OpenMenus ) {
		var h = false;
		var c = 0;
		for(var i in OpenMenus) {
			if( h ) {
				var m = document.getElementById(OpenMenus[i]);
				m.style.visibility = "hidden";
			} else if( OpenMenus[i] == menuName ) {
				h = true;
			} else {
				c++;
			}
		}
		OpenMenus.length = c+1;
	}
}

function MenuOverMenuItem(menuName, subMenuSuffix) {
	MenuResetTimeout();
	MenuHideSubmenus(menuName);
	if( subMenuSuffix ) {
		var subMenuName = "" + menuName + "_" + subMenuSuffix;
		MenuShowSubMenu(subMenuName);
	}
}

function MenuShowSubMenu(subMenuName) {
	MenuResetTimeout();
	var e = document.getElementById(subMenuName);
	e.style.visibility = "inherit";
	if( !OpenMenus ) {
		OpenMenus = new Array;
	}
	OpenMenus[OpenMenus.length] = "" + subMenuName;
}

function MenuResetTimeout() {
	if (HideMenuTimer) clearTimeout(HideMenuTimer);
	HideMenuTimer = null;
}

function MenuShowMenu(containName, menuName, xOffset, yOffset, triggerName) {
	MenuHideMenus();
	MenuResetTimeout();
	MenuShowMenuContainer(containName, xOffset, yOffset, triggerName);
	MenuShowSubMenu(menuName);
}

function MenuShowMenuContainer(containName, x, y, triggerName) {	
	var c = document.getElementById(containName);
	var s = c.style;
	s.visibility = "inherit";
	
	OpenContainer = "" + containName;
}