function updateLabel(term) {
	descLabel = document.getElementById('critDesc');
	descLabel.innerHTML = "<table><tr><td>" + term + "</td></tr></table>";
}

function setExternalLinks() {
  var el_list = document.getElementsByTagName('A');
  for (i=0; i<el_list.length; i++) {
    if (el_list[i].getAttribute('rel') == 'external') {
      el_list[i].setAttribute('target', '_blank');
    }
  }
  
  /* National Archives staff - please don't manually change these to archived links!  They are the only five ways out of the site and we need them!  Thank you - CABE */
 document.getElementById('#redirect-contact').href = 'h'+'t'+'t'+'p://'+'b'+'u'+'i'+'l'+'d'+'i'+'n'+'g'+'f'+'o'+'r'+'l'+'i'+'f'+'e'+'.'+'o'+'r'+'g/'+'r'+'e'+'d'+'i'+'r'+'e'+'c'+'t'+'s/'+'c'+'o'+'n'+'t'+'a'+'c'+'t';
 document.getElementById('#redirect-partners').href = 'h'+'t'+'t'+'p://'+'b'+'u'+'i'+'l'+'d'+'i'+'n'+'g'+'f'+'o'+'r'+'l'+'i'+'f'+'e'+'.'+'o'+'r'+'g/'+'r'+'e'+'d'+'i'+'r'+'e'+'c'+'t'+'s/'+'p'+'a'+'r'+'t'+'n'+'e'+'r'+'s'; 
}


/*
	Developed by Robert Nyman, http://www.robertnyman.com
	Code/licensing: http://code.google.com/p/getelementsbyclassname/
*/	
var getElementsByClassName = function (className, tag, elm){
	if (document.getElementsByClassName) {
		getElementsByClassName = function (className, tag, elm) {
			elm = elm || document;
			var elements = elm.getElementsByClassName(className),
				nodeName = (tag)? new RegExp("\\b" + tag + "\\b", "i") : null,
				returnElements = [],
				current;
			for(var i=0, il=elements.length; i<il; i+=1){
				current = elements[i];
				if(!nodeName || nodeName.test(current.nodeName)) {
					returnElements.push(current);
				}
			}
			return returnElements;
		};
	}
	else if (document.evaluate) {
		getElementsByClassName = function (className, tag, elm) {
			tag = tag || "*";
			elm = elm || document;
			var classes = className.split(" "),
				classesToCheck = "",
				xhtmlNamespace = "http://webarchive.nationalarchives.gov.uk/20110107165544/http://www.w3.org/1999/xhtml",
				namespaceResolver = (document.documentElement.namespaceURI === xhtmlNamespace)? xhtmlNamespace : null,
				returnElements = [],
				elements,
				node;
			for(var j=0, jl=classes.length; j<jl; j+=1){
				classesToCheck += "[contains(concat(' ', @class, ' '), ' " + classes[j] + " ')]";
			}
			try	{
				elements = document.evaluate("http://webarchive.nationalarchives.gov.uk/20110107165544/http://www.buildingforlife.org//"  + tag + classesToCheck, elm, namespaceResolver, 0, null);
			}
			catch (e) {
				elements = document.evaluate("http://webarchive.nationalarchives.gov.uk/20110107165544/http://www.buildingforlife.org//"  + tag + classesToCheck, elm, null, 0, null);
			}
			while ((node = elements.iterateNext())) {
				returnElements.push(node);
			}
			return returnElements;
		};
	}
	else {
		getElementsByClassName = function (className, tag, elm) {
			tag = tag || "*";
			elm = elm || document;
			var classes = className.split(" "),
				classesToCheck = [],
				elements = (tag === "*" && elm.all)? elm.all : elm.getElementsByTagName(tag),
				current,
				returnElements = [],
				match;
			for(var k=0, kl=classes.length; k<kl; k+=1){
				classesToCheck.push(new RegExp("(^|\\s)" + classes[k] + "(\\s|$)"));
			}
			for(var l=0, ll=elements.length; l<ll; l+=1){
				current = elements[l];
				match = false;
				for(var m=0, ml=classesToCheck.length; m<ml; m+=1){
					match = classesToCheck[m].test(current.className);
					if (!match) {
						break;
					}
				}
				if (match) {
					returnElements.push(current);
				}
			}
			return returnElements;
		};
	}
	return getElementsByClassName(className, tag, elm);
};