var loaded = 0;
var menuimages = null;

function loadimages()
{
  var i;
  var count = 0;
  var url;
  var name;
  var re = /1(.*)$/;

  for(i=0; i<document.images.length; i++) {
    if (document.images[i].id.substr(0, 5) == "flip_") {
      count++;
    }
  }

  menuimages = new Array(count);

  count = 0;
  for(i=0; i<document.images.length; i++) {
    if (document.images[i].id.substr(0, 5) == "flip_") {
      name = document.images[i].id;
      url = document.images[i].src;

      menuimages[name] = new Array(2);
      menuimages[name][0] = new Image;
      menuimages[name][0].src = url;

      menuimages[name][1] = new Image;
      menuimages[name][1].src = url.replace(re, "2$1");
    }
  }

  return true;
}

function flip(obj)
{
  if (menuimages != null && menuimages[obj.id]) {
    obj.src=menuimages[obj.id][1].src;
  }
  return true;
}


// mouse unflip over a link
function unflip(obj)
{
  if (menuimages != null && menuimages[obj.id]) {
    obj.src=menuimages[obj.id][0].src;
  }
  return true;
}