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 ChangeImage(id)
{
	var i=document.getElementById('twist_'+id);
	i.src="images/bullet1.gif";
}
function ChangeImage2(id)
{
	var i=document.getElementById('twist_'+id);
	i.src="images/bulets2.gif";
}
function ChangeLeft(id)
{
	var i=document.getElementById('Left_'+id);
	i.src="images/button-left.gif";
}
function ChangeLeft2(id)
{
	var i=document.getElementById('Left_'+id);
	i.src="images/leftbutton_green.jpg";
}
function ChangeRight(id)
{
	var i=document.getElementById('Right_'+id);
	i.src="images/button-right.gif";
}
function ChangeRight2(id)
{
	var i=document.getElementById('Right_'+id);
	i.src="images/green-button-right.jpg";
}
*/