var MAX = 6;
	var img = new Array ();
	for (var i=0; i<MAX;i++)
		img[i] = 0;
	
	function Images (org, swap)
	{
	 	if (document.images)
		{
		   this.org = new Image();
		   this.org.src = org;
		   this.swap = new Image();
		   this.swap.src = swap;
		}
	}
		
	function Add (iid)
	{
	 	img[iid] = new Images("images/"+iid+".gif", "images/"+iid+"_on.gif");
	}
	
	function Swap(iid)
	{
		if ( document.images[iid].src != img[iid].org.src)
			document.images[iid].src = img[iid].org.src;
		else document.images[iid].src = img[iid].swap.src;
	}

	function Enter (e,iid)
	{
	 	if (document.images)
		{
		   document.images[iid].src = img[iid].swap.src;
		}
	}
	
	function Out (e,iid)
	{
		if (document.images)
		{
		     document.images[iid].src = img[iid].org.src;
		}
	}