function prepareGallery(){
	if (!document.getElementsByTagName || !document.getElementById) return false;
	if (!document.getElementById("imagelist")) return false;
	var list = document.getElementById("imagelist");
	var links = list.getElementsByTagName("a");
	for (i=0; i<links.length; i++){
		links[i].onclick = function(){
		showPic(this);
		return false;
		}
	}
}

function showPic(whichpic){
	if (!document.getElementById("placeholder")) return false;
	var source = whichpic.getAttribute("href");
	var placeholder = document.getElementById("placeholder");
	placeholder.src = source;
	
	if (!document.getElementById("img-description")) return false;	
	var img_text = whichpic.getAttribute("title");
	var p_text = document.getElementById("img-description");
	p_text.firstChild.nodeValue = img_text;
}

addLoadEvent(prepareGallery);