// JavaScript Document

var nav_timeout = null;
var objects = new Array('about_sub', 'information_sub', 'links_sub');

function toggleSubNav(showSub, objName) {
  if (nav_timeout != null) {
	  clearTimeout(nav_timeout);
	  for (i = 0; i < objects.length; i++) {
	    findObj(objects[i]).style.visibility = 'hidden';
	  }
  }
  obj = findObj(objName).style;
  if (showSub) {
	  obj.visibility = 'visible';
  }
  else {
	  nav_timeout = setTimeout("obj.visibility = 'hidden'", 400);
  }
}


function findObj(theObj, theDoc) {
  var p, i, foundObj;
  if (!theDoc) theDoc = document;
  if ((p = theObj.indexOf("?")) > 0 && parent.frames.length) {
    theDoc = parent.frames[theObj.substring(p+1)].document;
    theObj = theObj.substring(0,p);
  }
  if (!(foundObj = theDoc[theObj]) && theDoc.all) foundObj = theDoc.all[theObj];
  for (i=0; !foundObj && i < theDoc.forms.length; i++) 
    foundObj = theDoc.forms[i][theObj];
  for (i=0; !foundObj && theDoc.layers && i < theDoc.layers.length; i++) 
    foundObj = findObj(theObj,theDoc.layers[i].document);
  if (!foundObj && document.getElementById) foundObj = document.getElementById(theObj);
  return foundObj;
}