// JavaScript Document
var menus = new Array();

function menu(oid)
{
	if (menus[oid] == null)
		menus[oid] = 0;
	
	if (menus[oid])
	{
		menus[oid] = 0;
		hide(oid);
	}
	else
	{
		menus[oid] = 1;
		showa(oid);
	}
}

function showa(oid)
{
	document.getElementById(oid).className = 'visible';
}

function hide(oid)
{
	document.getElementById(oid).className = 'invisible';
}