function findObj(n, d) {
  var p,i,x;
  if (!d) d = document;
  if ((p=n.indexOf("?"))>0 && parent.frames.length) {
    d = parent.frames[n.substring(p+1)].document;
    n = n.substring(0,p);
  }
  if (!(x=d[n]) && d.all) x=d.all[n];
  for (i=0; !x&&i<d.forms.length; i++) x = d.forms[i][n];
  for (i=0; !x&&d.layers && i<d.layers.length; i++) x = findObj(n,d.layers[i].document);
  if (!x && document.getElementById) x = document.getElementById(n);
  return x;
}
function change_hint(to_hide, to_show) {
	var div_hide = findObj('notice_'+to_hide);
	var div_show = findObj('notice_'+to_show);
	if (div_hide && div_show) {
		div_hide.style.display = 'none';
		div_show.style.display = 'block';
	}
}