/**
 * 
 * show/hide
 * Copyright (c) 2007 Twente Multimedia B.V.
 * 
 * @author Niels Westerhof <n.westerhof@twentemultimedia.nl>
 * 
 */

	// functions to show and hide elements
	function hideItem() { 
		document.getElementById('item1').style.display = "none";
		document.getElementById('item2').style.display = "none";
		document.getElementById('item3').style.display = "none";
	}
	function showItem(n) { 
		hideItem(); 
		document.getElementById('item' + n).style.display = "block"; 
	}