var currentNews = 1;

function showNews (n) {
  document.getElementById ('news' + currentNews).style.display = 'none';
  document.getElementById ('news' + n).style.display = 'inline';
  document.getElementById ('newslink' + currentNews).className = '';
  document.getElementById ('newslink' + n).className = 'current';
  currentNews = n;
}


var currentAnnouncement = 1;

function showAnnouncement (n) {
  document.getElementById ('announcement' + currentAnnouncement).style.display = 'none';
  document.getElementById ('announcement' + n).style.display = 'inline';
  document.getElementById ('announcementlink' + currentAnnouncement).className = '';
  document.getElementById ('announcementlink' + n).className = 'current';
  currentAnnouncement = n;
}


function toggle (layer) {
		if (document.getElementById(layer).style.display == 'inline') document.getElementById(layer).style.display = 'none';
		else document.getElementById(layer).style.display = 'inline';
}


function toggle_thumbnail_view ()
{
		toggle('thumbnail_view');
		e = document.getElementById('thumbnail_view_link');
		if (e.innerHTML == 'hide pict-o-view') { e.innerHTML = 'pict-o-view'; }
	else if (e.innerHTML == 'pict-o-view') { e.innerHTML = 'hide pict-o-view'; };
}


function toggle_item_more1 ()
{
		toggle('item_more1');
		e = document.getElementById('item_more1_link');
		if (e.innerHTML == 'back') { e.innerHTML = 'view sample pages'; }
	else if (e.innerHTML == 'view sample pages') { e.innerHTML = 'back'; };
}


function toggle_item_more2 ()
{
		toggle('item_more2');
		e = document.getElementById('item_more2_link');
		if (e.innerHTML == 'back') { e.innerHTML = 'view sample pages'; }
	else if (e.innerHTML == 'view sample pages') { e.innerHTML = 'back'; };
}


function toggle_item_more3 ()
{
		toggle('item_more3');
		e = document.getElementById('item_more3_link');
		if (e.innerHTML == 'back') { e.innerHTML = 'view sample pages'; }
	else if (e.innerHTML == 'view sample pages') { e.innerHTML = 'back'; };
}