var locked_menus = new Array();

function find_item(itemid)
{
	for (var i=0;i<locked_menus.length;i++)
	{
		if (locked_menus[i] == itemid)
		{
			return i;
		}
	}
	return -1;
}

function mShow(itemid)
{
	if (document.getElementById('smc_' + itemid).className != 'submenu_container_visible')
		document.getElementById('smc_' + itemid).className = 'submenu_container_visible';
}

function mHide(itemid)
{
	if (find_item(itemid) == -1)
	{
		document.getElementById('smc_' + itemid).className = 'submenu_container';
	}
}

function sMenuOver(itemid)
{
	if (find_item(itemid) == -1)
	{
		locked_menus.unshift(itemid);
		mShow(itemid);
	}
}

function sMenuOut(itemid)
{
	if (locked_menus[locked_menus.length-1] == itemid)
	{
		locked_menus.pop(locked_menus.length-1);
		mHide(itemid);
	}
}