var old_map = 'images/SWmap.gif';
			var image_90 = new Image(0, 0);
			image_90.src = 'images/SWmap_BB.gif';
			image_90.alt = 'Area Map with Avon Highlighted';
			var image_91 = new Image(0, 0);
			image_91.src = 'images/SWmap_other.gif';
			image_91.alt = 'Area Map with Other Highlighted';
			
			function changeMap(new_map) {
				document.getElementById('map').src = 'images/SWmap_' + new_map;
			}
			function revertMap() {
				document.getElementById('map').src = 'images/SWmap.gif';
			}
			function submitCluster(cluster) {
				detectType();
				document.getElementById('cluster').value = cluster;
				document.getElementById('allParam').removeAttribute('name');
				document.getElementById('mainForm').submit();
				return false;
			}
			
			function submitForm() {A
				detectType();
				document.getElementById('cluster').removeAttribute('name');
				document.getElementById('mainForm').submit();
				return false;
			}
			
			function detectType() {
				var ctrl1 = document.getElementById('searchType1');
				document.getElementById('mainForm').action = ctrl1.checked ? 'SearchCourse' : 'SearchProvider';
			}