function TsAutoHover() {
		if (!document.getElementsByTagName) {
			return;
		}
		var imgs = document.getElementsByTagName('img');
		var i, l = imgs.length;
		var j, m;
		var reSwapme = /autoswap|auto-swap/;
		var reIsActive = /_a\.[a-z]+/;
		var reFileParts = /(.*)\.([a-z]+$)/;
		var srcParts;
		for (i = 0; i < l; i++) {
			if (reSwapme.test(imgs[i].className) && !reIsActive.test(imgs[i].src)) {
				srcParts = imgs[i].src.match(reFileParts)
				imgs[i]._srcNormal = imgs[i].src;
				imgs[i]._srcActive = srcParts[1] + '_a.' + srcParts[2];
				imgs[i].onmouseover = function() {
					this.src = this._srcActive;
				}
				imgs[i].onmouseout = function() {
					this.src = this._srcNormal;
				}
			}
		}

		// Zusatzeinbau: Auch Images für Submit Buttons berücksichtigen.
		var inputs = document.getElementsByTagName('input');
		l = inputs.length;
		for (i = 0; i < l; i++) {
			if (reSwapme.test(inputs[i].className) && !reIsActive.test(inputs[i].src)) {
				srcParts = inputs[i].src.match(reFileParts)
				inputs[i]._srcNormal = inputs[i].src;
				inputs[i]._srcActive = srcParts[1] + '_a.' + srcParts[2];
				inputs[i].onmouseover = function() {
					this.src = this._srcActive;
				}
				inputs[i].onmouseout = function() {
					this.src = this._srcNormal;
				}
			}
		}

		if (window.oldOnload) {
			oldOnload();
		}
	}

	function TsAutoHoverInstall() {
		if (window.addEventListener) {
			window.addEventListener('load', TsAutoHover, true);
		} else if (window.attachEvent) {
			window.attachEvent('onload', TsAutoHover);
		} else {
			if (window.onload) {
				window.oldOnload = window.onload;
			}
			window.onload = TsAutoHover;
		}
	}

/* Allgemeine Funktion fuer zentriertes Popup, idealerweise schreibt man aber eine eigene Wrapper-function fuer explizite Anwendung, siehe unten */
function popupCenter(url, name, attributes, width, height) {
	topx = (screen.height - height) / 2;
	leftx = (screen.width - width) / 2;
	if (attributes.length > 0)
		if (attributes.substr(attributes.length-1,1) != ',')
			attributes += ','
	var w = window.open(url, name, attributes + 'width='+width+',height='+height+',screenx='+leftx+',screeny='+topx+',top='+topx+',left='+leftx+',status=yes,resizable=yes');
	w.focus();
}

function popupGallery(url) {
	popupCenter(url, 'Gallerypopup', '', 800, 600);
	return false;
}
function popupScreening(url) {
	popupCenter(url, 'ScreeningRoomPopup', '', 800, 600);
	return false;
}