// JavaScript Document

// max number of sub-menus
var g_SubNavMax = 10;

//----- hide all sub-menus

function	SubNav_HideAll()
{
	var	subMenu;

	for(var i = 0; i < g_SubNavMax; i++)
	{
		subMenu = document.getElementById("subMenu" + i);
		if(subMenu)
			subMenu.style.visibility = "hidden";
	}

}

//----- show specified sub-menu

function	SubNav_Show(id)
{
	SubNav_HideAll();

	var displayMenu = document.getElementById(id);
	
	if(displayMenu)
		displayMenu.style.visibility = "visible";
}

//----- check if moved away from menu area, and remove all sub-menus

function	SubNav_Handler(event, miny, maxy)
{
	if(event.clientY < miny || event.clientY > maxy)
		SubNav_HideAll();
}