var OldDiv;

function MM_showHideLayers() { //v9.0
  var i,p,v,obj,args=MM_showHideLayers.arguments;
  for (i=0; i<(args.length-2); i+=3) 
  with (document) if (getElementById && ((obj=getElementById(args[i]))!=null)) { v=args[i+2];
    if (obj.style) { obj=obj.style; v=(v=='show')?'visible':(v=='hide')?'hidden':v; }
    obj.visibility=v; }
}

function ViewDiv(nMap){
	document.getElementById(nMap).style.visibility='visible';
	if ((OldDiv!=null) && (OldDiv!=nMap)) {HideDiv(OldDiv);}
	OldDiv=nMap;
}

function HideDiv(nMap){
	document.getElementById(nMap).style.visibility='hidden';
}