function openWindow(topic)
  // Opens up a window with the selected topic
  {
    hide(topic);
	if (topic == "encyclopedia") window.open("../../idb/encyclopedia.html", "", "width=660,height=500,scrollbars=yes,resizable=no,status=no,toolbar=no,location=no,menubar=no,left=0,top=0");
	else if (topic == "download") window.open("../../idb/download.html", "", "width=550,height=500,scrollbars=yes,resizable=no,status=no,toolbar=no,location=no,menubar=no,left=0,top=0");
	else if (topic == "help") window.open("../../idb/help.html", "", "width=650,height=500,scrollbars=yes,resizable=no,status=no,toolbar=no,location=no,menubar=no,left=0,top=0");
	else window.open("../../idb/encyclopedia.html#" + topic, "", "width=630,height=500,scrollbars=yes,resizable=no,status=no,toolbar=no,location=no,menubar=no,left=0,top=0");
  }