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++) {
  	href = links[i].getAttribute("href");
  	extension = href.slice(-3).toLowerCase();
  	if ((extension == "jpg") || (extension == "gif") || (extension == "png")) {
  		source = links[i].getAttribute("href");
  		links[i].setAttribute("title", source);
  		links[i].setAttribute("href", "#");
    	links[i].onclick = function() {
      	return showPic(this);
		}
	} else if (extension == "wmv") {
  		source = links[i].getAttribute("href");
  		links[i].setAttribute("title", source);
  		links[i].setAttribute("href", "#");
		links[i].onclick = function() {
			return showWMV(this);
		}
	}
  }
}

function showPic(whichpic) {
  var source = whichpic.getAttribute("title");
  var bigimage = document.getElementById("bigimage");
  var moviediv = document.getElementById("movies");
  bigimage.setAttribute("src", source);
  bigimage.setAttribute("width", 517);
  bigimage.setAttribute("height", 344);
  moviediv.style.display = "none";
  return false;
}

function showWMV(whichwmv) {
  var source = whichwmv.getAttribute("title");
  var videoid = source.slice(source.toLowerCase().lastIndexOf("media/") + 6, -4);
  var bigimage = document.getElementById("bigimage");
  var movholder = document.getElementById(videoid);
  var moviediv = document.getElementById("movies");
  moviediv.style.display = "block";
  bigimage.setAttribute("src", "");
  bigimage.setAttribute("width", 0);
  bigimage.setAttribute("height", 0);
  movholder.style.display = "block";
  return false;
}

addLoadEvent(prepareGallery);