function swapImg( numNewImg ) {
	stopShow();
	

    FadeInImage('imgMain', 'imgPhoto' + numNewImg + '.src', 'backgrounddiv')

	eval("document.imgMain.src = imgPhoto" + numNewImg + ".src");
	if (document.getElementById('imgLabel'))
		document.getElementById('imgLabel').innerHTML = numNewImg;
	numCurrentImg = numNewImg;
}

function startShow() {
	if (timer == null)
	    swapTimeout();
}

function stopShow() {
	if (timer != null){
		window.clearTimeout(timer);
		timer = null;				
	}
}
function toggleShow() {
	if (timer == null) {
	    startShow();
	} else {
		stopShow();				
	}
}

function nextImg() {
	numNewImg = numCurrentImg+1;
	if (numNewImg > numPhotos)
		numNewImg = 1
    

    FadeInImage('imgMain', 'imgPhoto' + numNewImg + '.src', 'backgrounddiv')
    
    
    eval("document.imgMain.src = imgPhoto" + numNewImg + ".src");    
	if (document.getElementById('imgLabel'))
		document.getElementById('imgLabel').innerHTML = numNewImg;
	numCurrentImg = numNewImg;
}

function prevImg() {
	numNewImg = numCurrentImg-1;
	if (numNewImg < 1)
		numNewImg = numPhotos

    
    FadeInImage('imgMain', 'imgPhoto' + numNewImg + '.src', 'backgrounddiv')
    
    
    
	eval("document.imgMain.src = imgPhoto" + numNewImg + ".src");
	if (document.getElementById('imgLabel'))
		document.getElementById('imgLabel').innerHTML = numNewImg;
	numCurrentImg = numNewImg;
}

function swapTimeout() {

	if ( numCurrentImg == numPhotos ) { // We've just displayed the last img.
		numCurrentImg = 1;
	} else {
		numCurrentImg++;
	}

	swapImg(numCurrentImg);
	timer = window.setTimeout(swapTimeout, numSeconds);
}



// Opacity and Fade in script.
// Script copyright (C) 2008 http://www.cryer.co.uk/.
// Script is free to use provided this copyright header is included.
function SetOpacity(object, opacityPct) {
    // IE.
    object.style.filter = 'alpha(opacity=' + opacityPct + ')';
    // Old mozilla and firefox
    object.style.MozOpacity = opacityPct / 100;
    // Everything else.
    object.style.opacity = opacityPct / 100;
}
function ChangeOpacity(id, msDuration, msStart, fromO, toO) {
    var element = document.getElementById(id);
    var opacity = element.style.opacity * 100;
    var msNow = (new Date()).getTime();
    opacity = fromO + (toO - fromO) * (msNow - msStart) / msDuration;
    if (opacity < 0)
        SetOpacity(element, 0)
    else if (opacity > 100)
        SetOpacity(element, 100)
    else {
        SetOpacity(element, opacity);
        element.timer = window.setTimeout("ChangeOpacity('" + id + "'," + msDuration + "," + msStart + "," + fromO + "," + toO + ")", 1);
    }
}
function FadeIn(id) {
    var element = document.getElementById(id);
    if (element.timer) window.clearTimeout(element.timer);
    var startMS = (new Date()).getTime();
    element.timer = window.setTimeout("ChangeOpacity('" + id + "',1000," + startMS + ",0,100)", 1);
}
function FadeOut(id) {
    var element = document.getElementById(id);
    if (element.timer) window.clearTimeout(element.timer);
    var startMS = (new Date()).getTime();
    element.timer = window.setTimeout("ChangeOpacity('" + id + "',1000," + startMS + ",100,0)", 1);
}
function FadeInImage(foregroundID,newImage,backgroundID)
{
  
  var foreground=document.getElementById(foregroundID);
  if (backgroundID)
  {
    var background=document.getElementById(backgroundID);
    if (background)
    {
      background.style.backgroundImage = 'url(' + foreground.src + ')';
      background.style.backgroundRepeat = 'no-repeat';
      background.style.backgroundPosition = 'top';
      background.style.width = '800px';
      
      
    }
  }
  SetOpacity(foreground,0);
  foreground.src = newImage;
  if (foreground.timer) window.clearTimeout(foreground.timer);
  var startMS = (new Date()).getTime();
  foreground.timer = window.setTimeout("ChangeOpacity('" + foregroundID + "',1000," + startMS + ",0,100)", 10);
  
}