function initPopup() {
	for(var i = 0; i < document.getElementsByTagName('a').length; i++) {
		var node = document.getElementsByTagName('a')[i];
		if (		node.className.match(/^popup$/)
				||	node.className.match(/^popup\ /)
				||	node.className.match(/\ popup$/)
				||	node.className.match(/\ popup\ /)) {
			node.onclick = function() {
					var ghost = "/popup.php?bild_url=" + this.getAttribute('href');
					var x = x / 2 * 2 + 50;
					var y = y / 2 * 2 + 50;
					var options = "width=" + x + ",height=" + y + ",resizable=yes,X=0,Y=0";
					return !window.open(ghost,'Detail',options);
			}	
		}
	}
}

addInitFunction(initPopup);