function displayMenu(obj)
{
	var id = obj.id;
	
	for(var i = 0; i <= 6; i++)
	{
		if(document.getElementById('submenu'+i))
		{
			document.getElementById('submenu'+i).style.display = "none";
		}
	}
	
	if(document.getElementById('sub'+id))
	{
		document.getElementById('sub'+id).style.display = "block";
	}
}