function initializeClock() {
	startclock();
}

var hoverCourant = 0;
var hoverPrecedent = 0;
var timerID = null;
var timerRunning = false;

var layerList = new Array();
var btnname = new Array();
var btnoff = new Array();
var btnon = new Array();
	
	layerList[1] = 'menu1';
	btnname[1] = 'Home';
	btnon[1] = '..';
	btnoff[1] = '..';
	layerList[2] = 'menu2';
	btnname[2] = 'About';
	btnon[2] = '..';
	btnoff[2] = '..';
	layerList[3] = 'menu3';
	btnname[3] = 'Publications';
	btnon[3] = '..';
	btnoff[3] = '..';
	layerList[4] = 'menu4';
	btnname[4] = 'Expertise';
	btnon[4] = '..';
	btnoff[4] = '..';
	layerList[5] = 'menu5';
	btnname[5] = 'Presentations';
	btnon[5] = '..';
	btnoff[5] = '..';
	layerList[6] = 'menu6';
	btnname[6] = 'Media Room';
	btnon[6] = '..';
	btnoff[6] = '..';
	layerList[7] = 'menu7';
	btnname[7] = 'Invite Andy';
	btnon[7] = '..';
	btnoff[7] = '..';
	layerList[7] = 'menu8';
	btnname[7] = 'Blog';
	btnon[7] = '..';
	btnoff[7] = '..';


function swapState(btn,btnPrec) {
	//Turn the old layer off
	if (btnPrec > 0) {

		MM_showHideLayers(layerList[btnPrec],'','hide');
		MM_swapImage(btnname[btnPrec],'',btnon[btnPrec]);
		//MM_swapImgRestore()
	}
	//change state of designated button and layer
	if (btn > 0) {
		MM_showHideLayers(layerList[btn],'','show');
		MM_swapImage(btnname[btn],'',btnoff[btn]);
	}
	return true;
}

function stopclock() {
	if(timerRunning)
	clearTimeout(timerID);
	timerRunning = false;
}

function StageRedraw() {
	updateStage()
	timerID = setTimeout("StageRedraw()",5000);
	timerRunning = true;
}

function updateStage() {
	if (hoverCourant != hoverPrecedent) {
		swapState(hoverCourant,hoverPrecedent);
		hoverPrecedent = hoverCourant;
	}
}

function startclock() {
	stopclock();
	StageRedraw();
}

function passEsc(evt) {
	if (window.event.keyCode == 27) { hoverCourant = 0; updateStage();}
}


function MM_reloadPage(init) {  //reloads the window if Nav4 resized
  if (init==true) with (navigator) {if ((appName=="Netscape")&&(parseInt(appVersion)==4)) {
    document.MM_pgW=innerWidth; document.MM_pgH=innerHeight; onresize=MM_reloadPage; }}
  else if (innerWidth!=document.MM_pgW || innerHeight!=document.MM_pgH) location.reload();
}
MM_reloadPage(true);

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() { //v3.0
  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; }
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

function displayWindow(url, WindowName, width, height) 
{
	var Win = window.open(url, WindowName, 'width=' + width + ',height=' + height + ',resizable=yes,scrollbars=yes,menubar=no,status=no,toolbar=no,location=no' );
	Win.focus();

	return false;
}
function closeWindow(){
	window.close();
}