function BW(Name,ImageSrc)
{
   if(document.images)
      document[Name].src=ImageSrc;
}

function LD()
{
	var nth = new Image();
	nth.src = "irlmapn.gif";
	var wst = new Image();
	wst.src = "irlmapw.gif";
	var est = new Image();
	est.src = "irlmape.gif";
	var mid = new Image();
	mid.src = "irlmapm.gif";
	var sth = new Image();
	sth.src = "irlmaps.gif";
	var swt = new Image();
	swt.src = "irlmapsw.gif";
}