function MM_findObj(n, d) { //v4.01
  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=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_showHideLayers() { //v6.0
  var i,p,v,obj,args=MM_showHideLayers.arguments;
  for (i=0; i<(args.length-2); i+=3) if ((obj=MM_findObj(args[i]))!=null) { v=args[i+2];
    if (obj.style) { obj=obj.style; v=(v=='show')?'visible':(v=='hide')?'hidden':v; }
    obj.visibility=v; }
}


// resize fix 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); }
}

// link style change
var cur_link;
function doLinkClass(lnk) {
  if (lnk && lnk.blur) lnk.blur();	// remove marquee
  if (!lnk || cur_link == lnk) return;
  if (cur_link) cur_link.className = "done";
  lnk.className = "on";
  cur_link = lnk;
}

var cur_item;	// holds id of currently visible layer
function swapLayers(lnk,id) {
  doLinkClass(lnk);
  if (cur_item) hideLayer(cur_item);
  showLayer(id);
  cur_item = id;
}

function showLayer(id) {
  var item = getElemRefs(id);
  if (item && item.css) item.css.visibility = "visible";
}

function hideLayer(id) {
  var item = getElemRefs(id);
  if (item && item.css) item.css.visibility = "hidden";
}

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

// get reference to nested layer for ns4
// from old dhtmllib.js by Mike Hall of www.brainjar.com
function getitemRef(item,doc) {
	if (document.layers) {
		var theitem;
		for (var i=0; i<doc.layers.length; i++) {
	  	theitem = doc.layers[i];
			if (theitem.name == item) return theitem;
			else if (theitem.document.layers.length > 0) 
	    	if ((theitem = getitemRef(item,theitem.document)) != null)
					return theitem;
	  }
		return null;
  }
}

function init(id,item) {
  var lnk = getElemRefs(id);
  swapLayers(lnk,item);
}