function prepareipplaceholder() {
  if (!document.createElement) return false;
  if (!document.createTextNode) return false;
  if (!document.getElementById) return false;
  if (!document.getElementById("ip")) return false;
  var ipplaceholder = document.createElement("img");
  ipplaceholder.setAttribute("id","ipplaceholder");
  ipplaceholder.setAttribute("src","../galrollover.gif");
  ipplaceholder.setAttribute("alt","image gallery");
  var gallery = document.getElementById("ip");
  insertAfter(ipplaceholder,gallery);
}

function prepareGallery() {
  if (!document.getElementsByTagName) return false;
  if (!document.getElementById) return false;
  if (!document.getElementById("pageContent")) return false;
  var gallery = document.getElementById("pageContent");
  var links = gallery.getElementsByTagName("a");
  var ipplaceholder = document.getElementById("ipplaceholder");
  for ( var i=0; i < links.length; i++) {
    links[i].onmouseover = function() {
      return showPic(this);
	}
	links[i].onmouseout = function() {
	  ipplaceholder.setAttribute("src","../galrollover.gif");
	}
  }
}

function showPic(whichpic) {
  if (!document.getElementById("ipplaceholder")) return true;
  if (whichpic.getAttribute("title")) {
	var title = whichpic.getAttribute("title");
  } else {
	var title = "";
  }
  var source = "sm-" + title;
  var ipplaceholder = document.getElementById("ipplaceholder");
  ipplaceholder.setAttribute("src",source);
}

addLoadEvent(prepareipplaceholder);
addLoadEvent(prepareGallery);