function changegallery (imgurl, imgdesc)
			{
			document.getElementById('galleryimg').src = imgurl
			document.getElementById('galdescription').innerHTML = imgdesc
			
			if (imgdesc == '')
				{
				document.getElementById('galdescription').style.visibility = 'hidden';
				
				}
			else
				{
				document.getElementById('galdescription').style.visibility = 'visible';
				}
			}