if (document.images) {
	thesources = new Array('sn-books-catalogues','sn-cards','sn-prints','sn-gifts','icon','navcollection','navexhibitions','navevents','naveducation','navshopping','navvenue','sn-pastandpresent','sn-linksandsupporters','snhome');
	theimages = new Array();
	for (tempval in thesources) {
		theimages[tempval] = new Image();
		theimages[tempval].src = "style/template34/images/"+thesources[tempval]+"-on.gif";
		}
	}
function switchimage(imgName,highlight) {
	if (document.images) {
		imgOn = document.images[imgName];
		if (highlight) {
			imgOn.src = "style/template34/images/"+imgName+"-on.gif";
			}
		else {
			imgOn.src = "style/template34/images/"+imgName+".gif";
			}
		}
	}