if (document.images) {
  var defImg = "pack";

  var shoff = new Image();
  shoff.src = "navHome.gif";
  var shon = new Image();
  shon.src = "navHome_on.gif";

  var aroff = new Image();
  aroff.src = "navLibrary.gif";
  var aron = new Image();
  aron.src = "navLibrary_on.gif";

  var nuoff = new Image();
  nuoff.src = "navNutrition.gif";
  var nuon = new Image();
  nuon.src = "navNutrition_on.gif";
 
  var exoff = new Image();
  exoff.src = "navExAdvice.gif";
  var exon = new Image();
  exon.src = "navExAdvice_on.gif";

  var neoff = new Image();
  neoff.src = "navNews.gif";
  var neon = new Image();
  neon.src = "navNews_on.gif";

  var evoff = new Image();
  evoff.src = "navSportingEvents.gif";
  var evon = new Image();
  evon.src = "navSportingEvents_on.gif";

  var teoff = new Image();
  teoff.src = "navTeamEuk.gif";
  var teon = new Image();
  teon.src = "navTeamEuk_on.gif";

}

var isMenuAct = false;

function aMI(imgName) {
  a(imgName);
  i(defImg);
}

function iMI(imgName) {
  i(imgName);
  a(defImg);
}

function a(imgName) {
  if (document.images)
    document.images[imgName].src = eval(imgName + "_on.src");
}

function i(imgName) {
  if (document.images) {
    document.images[imgName].src = eval(imgName + ".src");
  }
}

function toggleLayer(whichLayer)
{
if (document.getElementById)
{
// this is the way the standards work
var style2 = document.getElementById(whichLayer).style;
style2.display = style2.display? "":"block";
}
else if (document.all)
{
// this is the way old msie versions work
var style2 = document.all[whichLayer].style;
style2.display = style2.display? "":"block";
}
else if (document.layers)
{
// this is the way nn4 works
var style2 = document.layers[whichLayer].style;
style2.display = style2.display? "":"block";
}
}