function toggleVis(primary,secondary, other)
	{
	target = document.getElementById(primary);
	arrow = document.getElementById(secondary);
	if (target.style.display == 'none')
		{
		// element is hidden so change it to visible
		target.style.display = 'block';
		arrow.src = 'http://ucdrss.org/img/tn_arrowup.gif';
		}
	else
		{
		// element is visible so change it to hidden
		target.style.display = 'none';
		arrow.src = 'http://ucdrss.org/img/tn_arrowdn.gif';
		}
	return;
	}

/*function toggleList(list, img)
	{
	list = document.getElementById(list);
	img = document.getElementById(img);
	if (list.className == 'list')
		{
		list.className='grid';
		img.src = 'img/gfx_picsgrid.jpg';
		}
	else
		{
		list.className='list';
		img.src = 'img/gfx_picslist.jpg';
		}
	}

function popUp(check)
	{
	target = document.getElementById(check);
	if (target.style.display=='none')
		{
		// element is hidden
		alert("The target is hidden!");
		}
	else
		{
		// element is visible
		alert("The target is visible!");
		}
	return;
	}
*/	
//onclick="popUp('mininav');