function toggle()
{
  var flipStyle = null;
  flipStyle = document.getElementById("flipStyle");
  if(flipStyle != null)
  {
    flipStyle.parentNode.removeChild(flipStyle);
  }
  else
  {
    flipStyle = document.createElement("style");
    flipStyle.id = "flipStyle";
    flipStyle.innerHTML = "a:hover img {-moz-transform: scalex(-1); -webkit-transform: scalex(-1); filter:fliph;} ";
    var container = document.getElementsByTagName("head")[0];
    container.appendChild(flipStyle);
  }
}