var FadeDurationMS=1000;

var ctime;
function startSlideShow(myPicture,myPictureBackground, myPicsPass)
{
	var displaySecs =5;
	var i = 0;
	myPics2 = myPicsPass;
myPics2.sort(function() {return 0.5 - Math.random()});
	RunSlideShow(myPicture,myPictureBackground, displaySecs, i, myPics2);
}

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 msNow = (new Date()).getTime();
  var opacity = fromO + (toO - fromO) * (msNow - msStart) / msDuration;
  if (opacity>=100)
  {
    SetOpacity(element,100);
    element.timer = undefined;
  }
  else if (opacity<=0)
  {
    SetOpacity(element,0);
    element.timer = undefined;
  }
  else 
  {
    SetOpacity(element,opacity);
    element.timer = window.setTimeout("ChangeOpacity('" + id + "'," + msDuration + "," + msStart + "," + fromO + "," + toO + ")",10);
  }
}
function FadeInImage(foregroundID,newImage,backgroundID)
{
  var foreground=document.getElementById(foregroundID);
  if (foreground.timer) window.clearTimeout(foreground.timer);
  if (backgroundID)
  {
    var background=document.getElementById(backgroundID);
    if (background)
    {
      if (background.src)
      {
        foreground.src = background.src; 
        SetOpacity(foreground,100);
      }
      background.src = newImage;
      background.style.backgroundImage = 'url(' + newImage + ')';
      background.style.backgroundRepeat = 'no-repeat';
      var startMS = (new Date()).getTime();
      foreground.timer = window.setTimeout("ChangeOpacity('" + foregroundID + "'," + FadeDurationMS + "," + startMS + ",100,0)",10);
    }
  } else {
    foreground.src = newImage;
  }
}

var slideCache = new Array();
function RunSlideShow(pictureID,backgroundID, displaySecs, i, myArray)
{

 var nextImage = myArray[i];

 if (i==myArray.length){
	 i=0;
 } else {
i++;
 }
  if (slideCache[nextImage] && slideCache[nextImage].loaded)
  {
    FadeInImage(pictureID,nextImage,backgroundID);
    //setTimeout("RunSlideShow('"+pictureID+"','"+backgroundID+"',"+displaySecs+","+ i +")", displaySecs*1000);
	setTimeout(function(){RunSlideShow(pictureID, backgroundID,displaySecs, i, myArray );}, displaySecs*1000);
    // Identify the next image to cache.
 
    nextImage = myArray[i];
  } else {
    //setTimeout("RunSlideShow('"+pictureID+"','"+backgroundID+"',"+displaySecs+","+ i +")", 250);
	setTimeout(function(){RunSlideShow(pictureID, backgroundID,displaySecs, i, myArray );}, 250);
  }
  // Cache the next image to improve performance.
  if (slideCache[nextImage] == null)
  {
    slideCache[nextImage] = new Image;
    slideCache[nextImage].loaded = false;
    slideCache[nextImage].onload = function(){this.loaded=true};
    slideCache[nextImage].src = nextImage;
  }

}