if (document.images) {

  // new button
  searchOn = new Image();
  searchOn.src = "/images/nav/search-ro.png"

  searchOff = new Image();
  searchOff.src = "/images/nav/search.png"

  // new button
  cartOn = new Image();
  cartOn.src = "/images/nav/cart-ro.png"

  cartOff = new Image();
  cartOff.src = "/images/nav/cart.png"

  // new button
  storefrontOn = new Image();
  storefrontOn.src = "/images/nav/storefront-ro.png"

  storefrontOff = new Image();
  storefrontOff.src = "/images/nav/storefront.png"

}

function changeImages() {
  // link syntax:
  // <a href="/xxx.php" onMouseOver="changeImages('xxx', 'xxxOn')" onMouseOut="changeImages('xxx', 'xxxOff')"><img src="/images/nav/xxx.png" alt="xxx" name="xxx" id="xxx" width="164" height="36" /></a>
  if (document.images) {
    for (var i=0; i<changeImages.arguments.length; i+=2) {
      document.images[changeImages.arguments[i]].src = window[changeImages.arguments[i+1]].src;
    }
  }
}

function toggle_info (el) {
  var myelement = document.getElementById(el);
  if( !myelement.style.display || myelement.style.display == "none" ) { myelement.style.display = "block"; }
  else { myelement.style.display = "none"; }
}