var imageNames = new Array("home", "products", "services", "development", "contact");
var imageBox = new Array(imageNames.length * 4);

for (i = 0; i < imageNames.length; i++)
  {
  imageBox[i * 4] = new Image();
  imageBox[i * 4].src = "/img/menu/" + imageNames[i] + ".gif";
  imageBox[i * 4 + 1] = new Image();
  imageBox[i * 4 + 1].src = "/img/menu/" + imageNames[i] + "-hover.gif";
  imageBox[i * 4 + 2] = new Image();
  imageBox[i * 4 + 2].src = "/img/penu/" + imageNames[i] + ".gif";
  imageBox[i * 4 + 3] = new Image();
  imageBox[i * 4 + 3].src = "/img/penu/" + imageNames[i] + "-hover.gif";
  }

function toggle(image, onNotOff)
  {
  i = image.src.indexOf(".gif");
  j = image.src.indexOf("-hover.gif");
  if (onNotOff)
    {
    if ((i != -1) && (j == -1))
      image.src = image.src.substring(0, i) + "-hover.gif";
    }
  else if (j != -1)
    image.src = image.src.substring(0, j) + ".gif";
  }