// preload mouseover images and set up javascript handling for them, if possible
if (document.images) {
  (new Image()).src = "img/1x1trans.gif";

  if (switchone = document.getElementById('switch1')) {
    (new Image()).src = "img/hyde.gif";
    switchone.onmouseover = function() { document.image1.src = "img/hyde.gif"; }
    switchone.onmouseout = function() { document.image1.src = "img/1x1trans.gif"; }
  }

  if (switchtwo = document.getElementById('switch2')) {
    (new Image()).src = "img/jekyll.gif";
    switchtwo.onmouseover = function() { document.image2.src = "img/jekyll.gif"; }
    switchtwo.onmouseout = function() { document.image2.src = "img/1x1trans.gif"; }
  }
}