//
// 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/
//
 
// Customize your photo shuffle settings
// 
// * Surround the target < img /> with a < div >. specify id= in both
// * The first and final photo displayed is in the html <img> tag
// * The array contains paths to photos you want in the rotation. 
//   If you want the first photo in the rotation, then it's best to
//   put it as the final array image.  All photos must be same dimension
// * The rotations variable specifies how many times to repeat array.
//   images. zero is a valid rotation value.

var gblPhotoShufflerDivId = "photo_loop";
var gblPhotoShufflerImgId = "photo_loop_img"; 
var gblImg = new Array('fileadmin/templates/main/photo_loop_01/img1.jpg','fileadmin/templates/main/photo_loop_01/img2dfada.jpg','fileadmin/templates/main/photo_loop_01/imdfadfsag1.jpg','fileadmin/templates/main/photo_loop_01/IMG_1578.JPG','fileadmin/templates/main/photo_loop_01/IMG_1520.JPG');
var gblPauseSeconds = 5;
var gblFadeSeconds = 2;
var gblRotations = 10;

// End Customization section

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;
}