var imgMinus = 'minus.gif', imgPlus = 'plus.gif';
		var ttlCollapse = 'collapse', ttlExpand = 'expand';
		
		function toggle(img) {
			var q, qid;
			q = img.nextSibling; //img.parentNode;
			qid = q.id.substr(1, 2);
			if (img.title == ttlCollapse) 
				docollapse(img, q, qid);
			else
				doexpand(img, q, qid);
		}
		
		function docollapse(img, q, qid) {
			var a = document.getElementById('a' + qid);
			q.style.fontWeight = 'normal';
			img.src = img.src.substr(0, img.src.length - imgMinus.length) + imgPlus;
			img.title = ttlExpand;
			a.style.display = 'none';
		}
		
		function doexpand(img, q, qid) {
			var a = document.getElementById('a' + qid);
			q.style.fontWeight = 'bold';
			img.src = img.src.substr(0, img.src.length - imgPlus.length) + imgMinus;
			img.title = ttlCollapse;
			a.style.display = 'block';
		}
		
		function doall(x) {
			var h3s, n, i, q, qid, img;
			h3s = document.getElementById('spalte2').getElementsByTagName('h3');
			n = h3s.length;
			for (i = 0; i < n; i++) {
				q = h3s[i];
				qid = h3s[i].id.substr(1, 2);
				img = q.previousSibling;
				if (x == 0 && img.title == ttlCollapse)
					docollapse(img, q, qid);
				else if (x == 1 && img.title == ttlExpand)
					doexpand(img, q, qid);
			}
		}