function hideAll()
	{
		divColl = document.all.tags("div");

      	for (i=0; i<divColl.length; i++)
			divColl(i).style.display = "none";
	}

	function hideLevel(_levelId)
	{
		var thisLevel = document.getElementById( _levelId );
		thisLevel.style.display = "none";
	}
	
	function showLevel(_levelId)
	{
		var thisLevel = document.getElementById( _levelId );

		if ( thisLevel.style.display == "none")
			thisLevel.style.display = "block";
		else
			hideLevel( _levelId);
	}
	
	function showOnlyLevel(_levelId)
	{
		var thisLevel = document.getElementById( _levelId );
		
		if ( thisLevel.style.display == "none")
		{
			thisLevel.style.display = "block";
			switch (_levelId)
			{
				case 'order':
					hideLevel('');					
					break;
				
			}
				
		}	
		else
			hideLevel(_levelId);
	}