function subMenu(obj) {
  var el = document.getElementById(obj);
	el.style.display = 'block';
}

function subMenuOff(obj) {
  var el = document.getElementById(obj);
	el.style.display = 'none';
}

function showpic(element,width,height)
{
  href   = element.href;
  title  = element.getElementsByTagName('img')[0].alt;
  swleft = Math.round((self.screen.width - width)/2);
  swtop  = Math.round((self.screen.height - height)/3);
  params = "height="+height+",width="+width+", left="+swleft+", top="+swtop+", toolbar=no, menubar=no, scrollbars=no, resizable=yes, location=no, directories=no, status=no";
  window.open(href,"",params);
}