var layerObj; 
var layerName;
  
 function setObj(obj)
 {
   if (document.getElementById)
   {
	 layerObj = document.getElementById(obj).style;
   }
   else if (document.all)
   {
	 layerObj = document.all(obj).style;
   }
   else 
   {
	 layerObj = document.obj;
   }
 }  
 
  function view(layerName)
 {
   setObj(layerName);
   layerObj.visibility = "visible";
 }

 /* This function is setting up the visibility of
    an object, in this case a layer, made hidden
	by using the layerName. */
	 
 function hide(layerName)
 {
   setObj(layerName);
   layerObj.visibility = "hidden";
 }


 function MakeImageArray(n)
 {
   this.length = n;
   for (var i = 1; i<=n; i++) 
   {
   this[i] = new Image();
   }
   return this
 }

 function msover(which, num) 
 { 
   document.images[which].src = hereOn[num].src;
 }


 function msout(which, num)
 { 
   document.images[which].src = hereOff[num].src;
 }