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

function showPic(whichPic)
{
	if (!document.getElementById("placeholder")) return true;
	var source = whichPic.getAttribute("href");
	var placeholder = document.getElementById("placeholder");
	placeholder.setAttribute("src", source);
	if (!document.getElementById("description")) return false;
	var text = whichPic.getAttribute("title");
	var description = document.getElementById("description");
	description.firstChild.nodeValue = text;
	return false;
}

addLoadEvent(prepareGallery);