function hideCollectionContent()
{
	cntnt = document.getElementById('coll_nfo_cntnt');
	cntnt.style.display = 'none';
}

function showCollectionContent()
{
	cntnt = document.getElementById('coll_nfo_cntnt');
	cntnt.style.display = 'block';
}

function hideHSLVBox(qn_id)
{
	box = document.getElementById('qn_hslv_box_' + qn_id);
	
	for (i = 0; i < box.childNodes.length; i++) {
		tmp = box.childNodes[i];
		if (tmp.nodeType != 3) {
			tmp.style.display = 'none';
		}
	}
}

function showHSLVBox(qn_id)
{
	box = document.getElementById('qn_hslv_box_' + qn_id);
	
	for (i = 0; i < box.childNodes.count; i++) {
		box.childNodes[i].style.display = 'block';
	}
}

function showHint(qn_id)
{
	hideHSLVBox(qn_id);
	cntnr = document.getElementById('hnt_cntnr_' + qn_id);
	cntnr.style.display = 'block';
}

function showSAns(qn_id)
{
	hideHSLVBox(qn_id);
	cntnr = document.getElementById('sans_cntnr_' + qn_id);
	cntnr.style.display = 'block';
}

function showLAns(qn_id)
{
	hideHSLVBox(qn_id);
	cntnr = document.getElementById('lans_cntnr_' + qn_id);
	cntnr.style.display = 'block';
}

function hideHSLVContainer(elem_id)
{
	document.getElementById(elem_id).style.display = 'none';
}