function preload() {
  var d = document; 
  if(d.images){ 
    if(!d.menu_p) d.menu_p=new Array();
    var i, j = d.menu_p.length, a = preload.arguments; 
    for(i = 0; i < a.length; i++)
     if (a[i].indexOf("#") != 0){ 
      d.menu_p[j] = new Image; 
      d.menu_p[j++].src = a[i];
     }
  }
}


function swapImgRestore() {
  var i,x,a = document.menu_sr; 
  for( i = 0; a && i < a.length && (x = a[i]) && x.oSrc; i++) 
   x.src = x.oSrc;
}


function findObj(n, d) {
  var p,i,x;  
  if(!d) d = document; 
  if((p = n.indexOf("?")) > 0 && parent.frames.length) {
    d = parent.frames[n.substring(p+1)].document; 
    n = n.substring(0,p);
  }
  if(!(x = d[n]) && d.all) x = d.all[n]; 
  for (i = 0; !x && i < d.forms.length; i++) 
   x = d.forms[i][n];
  for( i = 0; !x && d.layers && i < d.layers.length; i++) 
   x = findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x = d.getElementById(n); 
  return x;
}


function swapImage() {
  var i, j = 0, x, a = swapImage.arguments; 
  document.menu_sr = new Array; 
  for( i = 0; i < (a.length-2); i += 3)
   if ((x = findObj(a[i])) != null){
    document.menu_sr[j++] = x; 
    if(!x.oSrc) 
     x.oSrc=x.src; 
    x.src=a[i+2];
   }
}