//
// CSS Photo Shuffler v1.0 by
//   Carl Camera
//   http://iamacamera.org 
//
// SetOpacity Function and inpiration from Photo Fade by
//   Richard Rutter
//   http://clagnut.com
//
// License: Creative Commons Attribution 2.5  License
//   http://creativecommons.org/licenses/by/2.5/
//
/*
"tour/img/acid-index.jpg",
"tour/img/acid-quickpost.jpg",
"tour/img/forum-index-demo1.jpg",
"tour/img/forum-index-demo2.jpg",
"tour/img/forum-portal.jpg",
"tour/img/forum-kategorie.jpg",
"tour/img/admin-index.jpg",
"tour/img/admin-benutzer.jpg",
"tour/img/admin-upload.jpg",
"tour/img/admin-foren-befugnisse.jpg",
"tour/img/admin-foren-befugnisse2.jpg",
"tour/img/admin-foren-befugnisse3.jpg",
"tour/img/forum-index.jpg"
"tour/img/v2/forum_topics-xand.jpg",
"tour/img/v2/index-acidtech.jpg",
"tour/img/v2/index-redsun.jpg",
"tour/img/v2/acp_bbcode.jpg",
"tour/img/v2/",
"tour/img/v2/",
"http://img.userboard.org/tour/img/v2/portal-block-statistik.jpg",
*/
// Customize settings
var gblPhotoShufflerDivId = "foto";
var gblPhotoShufflerImgId = "fotos";
var gblPhotoShufflerImgClass = "relex";
var gblImg = new Array(
"http://img.userboard.org/tour/img/v2/portal-subsilver_dark.jpg",
"http://img.userboard.org/tour/img/v2/acp_portal_move.jpg",
"http://img.userboard.org/tour/img/v2/index_s_dark.jpg",
"http://img.userboard.org/tour/img/v2/acp_user_edit.jpg",
"http://img.userboard.org/tour/img/v2/index-brown.jpg",
"http://img.userboard.org/tour/img/v2/index-xand.jpg",
"http://img.userboard.org/tour/img/v2/forum_topics-xand.jpg",
"http://img.userboard.org/tour/img/v2/acp_map.jpg",
"http://img.userboard.org/tour/img/v2/subsilver_brown.jpg",
"http://img.userboard.org/tour/img/v2/index-pro_red.jpg"
);
var gblPauseSeconds = 1.85;
var gblFadeSeconds = 0.65;
var gblRotations = 3;

// End

var gblDeckSize = gblImg.length;
var gblOpacity = 100;
var gblOnDeck = 0;
var gblStartImg;
var gblImageRotations = gblDeckSize * (gblRotations+1);


function photoShufflerLaunch()
{
var theimg = document.getElementById(gblPhotoShufflerImgId);
    gblStartImg = theimg.src; // save away to show as final image

document.getElementById(gblPhotoShufflerDivId).style.backgroundImage='url(' + gblImg[gblOnDeck] + ')';
setTimeout("photoShufflerFade()",gblPauseSeconds*1000);
}

function photoShufflerFade()
{
var theimg = document.getElementById(gblPhotoShufflerImgId);

// determine delta based on number of fade seconds
// the slower the fade the more increments needed
    var fadeDelta = 100 / (30 * gblFadeSeconds);

// fade top out to reveal bottom image
if (gblOpacity < 2*fadeDelta ) 
{
  gblOpacity = 100;
  // stop the rotation if we're done
  if (gblImageRotations < 1) return;
  photoShufflerShuffle();
  // pause before next fade
      setTimeout("photoShufflerFade()",gblPauseSeconds*1000);
}
else
{
  gblOpacity -= fadeDelta;
  setOpacity(theimg,gblOpacity);
  setTimeout("photoShufflerFade()",30);  // 1/30th of a second
}
}

function photoShufflerShuffle()
{
var thediv = document.getElementById(gblPhotoShufflerDivId);
var theimg = document.getElementById(gblPhotoShufflerImgId);

// copy div background-image to img.src
theimg.src = gblImg[gblOnDeck];
// set img opacity to 100
setOpacity(theimg,100);

    // shuffle the deck
gblOnDeck = ++gblOnDeck % gblDeckSize;
// decrement rotation counter
if (--gblImageRotations < 1)
{
  // insert start/final image if we're done
  gblImg[gblOnDeck] = gblStartImg;
}

// slide next image underneath
thediv.style.backgroundImage='url(' + gblImg[gblOnDeck] + ')';
}


function setOpacity(obj, opacity) {
opacity = (opacity == 100)?99.999:opacity;
// IE/Win
obj.style.filter = "alpha(opacity:"+opacity+")";
// Safari<1.2, Konqueror
obj.style.KHTMLOpacity = opacity/100;
// Older Mozilla and Firefox
obj.style.MozOpacity = opacity/100;
// Safari 1.2, newer Firefox and Mozilla, CSS3
obj.style.opacity = opacity/100;
}

window.onload = photoShufflerLaunch;