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

function showPic(whichpic)
{
	var source = whichpic.getAttribute("href");
	var placeholder = document.getElementById("placeholder");
	if(placeholder.nodeName != "IMG") return true;
	placeholder.setAttribute("src",source);
	return false;
}

addLoadEvent(prepareGallery);