sfHover = function() {
	var sfEls = document.getElementById("nav").getElementsByTagName("LI");
	for (var i=0; i<sfEls.length; i++) {
		sfEls[i].onmouseover=function() {
			this.className+=" sfhover";
		}
		sfEls[i].onmouseout=function() {
			this.className=this.className.replace(new RegExp(" sfhover\\b"), "");
		}
	}
}
if (window.attachEvent) window.attachEvent("onload", sfHover);

/*************************************************************************
  This code is from Dynamic Web Coding at http://www.dyn-web.com/
  Copyright 2001-3 by Sharon Paine 
  See Terms of Use at http://www.dyn-web.com/bus/terms.html
  regarding conditions under which you may use this code.
  This notice must be retained in the code as is!
*************************************************************************/

// onresize for ns4
var origWidth, origHeight;
if (document.layers) {
	origWidth = window.innerWidth; origHeight = window.innerHeight;
	window.onresize = function() { if (window.innerWidth != origWidth || window.innerHeight != origHeight) history.go(0); }
}

var cur_lyr;  // holds id of currently visible layer
var cur_lyr2;
function swapLayers(id, id2) {
  if (cur_lyr) hideLayer(cur_lyr);
  showLayer(id);
  showLayer(id2);
  cur_lyr = id;
  cur_lyr2 = id2;
}

function showLayer(id, id2) {
  var lyr = getElemRefs(id);
  var lyr2 = getElemRefs(id2);
  if (lyr && lyr.css) lyr.css.visibility = "visible";
  if (lyr2 && lyr2.css) lyr2.css.visibility = "visible";
}

function hideLayer(id, id2) {
  var lyr = getElemRefs(id);
  var lyr = getElemRefs(id2);
  if (lyr && lyr.css) lyr.css.visibility = "hidden";
  if (lyr2 && lyr2.css) lyr2.css.visibility = "hidden";
}

function getElemRefs(id) {
	var el = (document.getElementById)? document.getElementById(id): (document.all)? document.all[id]: (document.layers)? document.layers[id]: null;
	if (el) el.css = (el.style)? el.style: el;
	return el;
}