showPic = function () {
	if (!document.getElementsByTagName) return false;
	if (!document.getElementById) return false;
	if (!document.getElementById("merken")) return false;
	var gallery = document.getElementById("merken");
	var links = gallery.getElementsByTagName("a");
	for (var i = 0; i < links.length; i++) {
		links[i].onmouseover = function() {
			return displayPic(this.id);
		}
		links[i].onmouseout = function() {
			return hidePic(this.id);
		}
	}
}

displayPic = function (whichpic) {
	if (!document.getElementById) return true;
	var pic = document.getElementById(whichpic);
	var pica = pic.src.replace(whichpic, whichpic + "_a");
	pic.src = pica;
	return false;
}

hidePic = function (whichpic) {
	if (!document.getElementById) return true;
	var pic = document.getElementById(whichpic);
	var pica = pic.src.replace(whichpic + "_a", whichpic);
	pic.src = pica;
	return false;
}