function showChunk(elementid) {
		
	var divs = new Array('gettingstarted','questionnaires','templates','data','users','tips','reference');
	var divslink = new Array('gettingstarted_link','questionnaires_link','templates_link','data_link','users_link','tips_link','reference_link');
		
	for (var i=0;i<divs.length;i++) {
		if (divs[i] == elementid) {
			if (document.getElementById(divs[i])) document.getElementById(divs[i]).style.display = 'block';
			if (document.getElementById(divslink[i])) document.getElementById(divslink[i]).style.backgroundColor = '#ccc';
		} else {
			if (document.getElementById(divs[i])) document.getElementById(divs[i]).style.display = 'none';
			if (document.getElementById(divslink[i])) document.getElementById(divslink[i]).style.backgroundColor = '#eee';
		}
	}	
	return true;
}	

function hideChunks() {

	var divs = new Array('questionnaires','templates','data','users','tips','reference');
		
	for (var i=0;i<divs.length;i++) {
		if (document.getElementById(divs[i])) document.getElementById(divs[i]).style.display = 'none';
	}	
	return true;
}