function setCat()
	{
		var baseURL = document.location.href;
		var eBegin = baseURL.indexOf("&Expand=");
		
		if (eBegin > 0) {
					var endStuff = baseURL.substring(eBegin + 8, baseURL.length);
					var beginStuff = baseURL.substring(0, eBegin);
					var topCat = endStuff.substring(0, endStuff.indexOf("."));
					var topStuff = topCat + "#" + topCat ;
					var topURL = beginStuff + "&Expand=" + topCat + "#" + topCat;

				for (i = 0; i < document.links.length; i++) {
					if (document.links[i].href == topURL) {
						if (document.links[i].target == '_self') {
								document.links[i].href = beginStuff + "&Collapse=" + topCat + "#" + topCat;
						}
					}	
					if (document.links[i].href == baseURL) {
						if (document.links[i].target == '_self') {
							document.links[i].href = beginStuff + "&Collapse=" + endStuff;
						}
					}		
				}
		} else {
					var eBegin = baseURL.indexOf("&Collapse=");
					var endStuff = baseURL.substring(eBegin + 10, baseURL.length);
					var beginStuff = baseURL.substring(0, eBegin);
					var topCat = endStuff.substring(0, endStuff.indexOf("."));
					var topStuff = topCat + "#" + topCat ;
					var topURL = beginStuff + "&Expand=" + topCat + "#" + topCat;

				for (i = 0; i < document.links.length; i++) {
					if (document.links[i].href == topURL) {
						if (document.links[i].target == '_self') {
								document.links[i].href = beginStuff + "&Collapse=" + topCat + "#" + topCat;
						}
					}	
					if (document.links[i].href == baseURL) {
						if (document.links[i].target == '_self') {
							document.links[i].href = beginStuff + "&Expand=" + endStuff;
						}
					}		
				}		
		}
	}