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_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_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 MM_showHideLayers() { //v9.0
  var i,p,v,obj,args=MM_showHideLayers.arguments;
  for (i=0; i<(args.length-2); i+=3) 
  with (document) if (getElementById && ((obj=getElementById(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 layerOn(myLayer){
	var targetDiv = document.getElementById(myLayer + "Small")
	targetDiv.style.display = 'block';
	var targetDiv = document.getElementById(myLayer + "Large")
	targetDiv.style.display = 'none';
}
function layerOff(myLayer){
	var targetDiv = document.getElementById(myLayer + "Small")
	targetDiv.style.display = 'none';
	var targetDiv = document.getElementById(myLayer + "Large")
	targetDiv.style.display = 'block';
}

var timeout	= 500;
var closetimer	= 0;
var ddmenuitem	= 0;


function getPos(el) {
    // yay readability
    for (var lx=0, ly=0;
         el != null;
         lx += el.offsetLeft, ly += el.offsetTop, el = el.offsetParent);
    return {x: lx,y: ly};
}

function mopen(id)
{	
	
	mcancelclosetime();
	
	if(ddmenuitem) ddmenuitem.style.visibility = 'hidden';
	ddmenuitem = document.getElementById(id + "Menu");
	ddorigitem = document.getElementById(id + "Btn");
	ddshadowitem = document.getElementById(id + "Shadow");
	
	ddmenuitem.style.left = getPos(ddorigitem).x + 'px';
	ddshadowitem.style.left = (getPos(ddorigitem).x-42) + 'px';
	ddmenuitem.style.visibility = 'visible';
	ddshadowitem.style.visibility = 'visible';
	
	if(id=='about'){
		document.about21.src='../images/homeXeonSub_over_07.jpg';
		document.getElementById('featuresShadow').style.visibility = 'hidden';
		document.getElementById('participateShadow').style.visibility = 'hidden';
		document.getElementById('educatorsShadow').style.visibility = 'hidden';
		
	}else{
		document.about21.src='../images/homeXeonSub_07.jpg';
		
	}
	if(id=='features'){
		document.features21.src='../images/homeXeonSub_over_08.jpg';
		document.getElementById('aboutShadow').style.visibility = 'hidden';
		document.getElementById('participateShadow').style.visibility = 'hidden';
		document.getElementById('educatorsShadow').style.visibility = 'hidden';
	}else{
		document.features21.src='../images/homeXeonSub_08.jpg';
	}
	if(id=='participate'){
		document.participate21.src='../images/homeXeonSub_over_09.jpg';
		document.getElementById('educatorsShadow').style.visibility = 'hidden';
		document.getElementById('aboutShadow').style.visibility = 'hidden';
		document.getElementById('featuresShadow').style.visibility = 'hidden';
	}else{
		document.participate21.src='../images/homeXeonSub_09.jpg';
		
	}
	if(id=='educators'){
		document.educators21.src='../images/homeXeonSub_over_10.jpg';
		document.getElementById('aboutShadow').style.visibility = 'hidden';
		document.getElementById('featuresShadow').style.visibility = 'hidden';
		document.getElementById('participateShadow').style.visibility = 'hidden';
	}else{
		document.educators21.src='../images/homeXeonSub_10.jpg';
	}
	
}
function mclose()
{
	if(ddmenuitem) ddmenuitem.style.visibility = 'hidden';
	if(ddshadowitem) ddshadowitem.style.visibility = 'hidden';
	document.about21.src='../images/homeXeonSub_07.jpg';
	document.features21.src='../images/homeXeonSub_08.jpg';
	document.participate21.src='../images/homeXeonSub_09.jpg';
	document.educators21.src='../images/homeXeonSub_10.jpg';
}
function mclosetime()
{
	closetimer = window.setTimeout(mclose, timeout);
}
function mcancelclosetime()
{
	if(closetimer)
	{
		window.clearTimeout(closetimer);
		closetimer = null;
	}
}
document.onclick = mclose; 

var TimeToFade = 1000.0;

function fade(eid)

{
  var element = document.getElementById(eid);
  if(element == null)
    return;
   
  //if(element.FadeState == null)
  //{
    /*if(element.style.opacity == null 
        || element.style.opacity == '' 
        || element.style.opacity == '1')
    {
      element.FadeState = 2;
    }
    else
    {
      element.FadeState = -2;
    }*/
	//alert(element.style.opacity);
	element.style.opacity = 0;
	//alert(element.style.opacity);
	element.FadeState = -2;
  //}
    
  if(element.FadeState == 1 || element.FadeState == -1)
  {
    element.FadeState = element.FadeState == 1 ? -1 : 1;
    element.FadeTimeLeft = TimeToFade - element.FadeTimeLeft;
  }
  else
  {
    element.FadeState = element.FadeState == 2 ? -1 : 1;
    element.FadeTimeLeft = TimeToFade;
    setTimeout("animateFade(" + new Date().getTime() + ",'" + eid + "')", 33);
  }  
}
function animateFade(lastTick, eid)
{  
  var curTick = new Date().getTime();
  var elapsedTicks = curTick - lastTick;
  
  var element = document.getElementById(eid);
 
  if(element.FadeTimeLeft <= elapsedTicks)
  {
    element.style.opacity = element.FadeState == 1 ? '1' : '0';
    element.style.filter = 'alpha(opacity = ' 
        + (element.FadeState == 1 ? '100' : '0') + ')';
    element.FadeState = element.FadeState == 1 ? 2 : -2;
    return;
  }
 
  element.FadeTimeLeft -= elapsedTicks;
  var newOpVal = element.FadeTimeLeft/TimeToFade;
  if(element.FadeState == 1)
    newOpVal = 1 - newOpVal;

  element.style.opacity = newOpVal;
  element.style.filter = 'alpha(opacity = ' + (newOpVal*100) + ')';
  
  setTimeout("animateFade(" + curTick + ",'" + eid + "')", 33);
}