function opentreebranch(uid) {
	var classattrib = document.getElementById('openTreeElement'+uid).className;
	var classes = classattrib.split(" ");
	var counter = 0;
	var newclasses = '';
	var openclass = ' open';
	while(counter < classes.length) {
		if(classes[counter] == 'open') {
			openclass = 'close';
			classes[counter] = '';
		}
		if(classes[counter] == 'close') {
			openclass = 'open';
			classes[counter] = '';
		}
		counter++;
	}
	newclasses = classes.join(" ");
	newclasses += openclass;
	document.getElementById('openTreeElement'+uid).className=newclasses;
}