//
  // CSS Photo Shuffler v1.0 by
  //   Carl Camera
  //   http://iamacamera.org 
  //
  // SetOpacity0 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
  // * set background-repeat:no-repeat in CSS for the div
  // * 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 = "header";
  var gblPhotoShufflerImgId = "photoimg"; 
  var gblImg = new Array(1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,0);
//  var gblImg = new Array(1,2,3,4,0);
  var gblPauseSeconds = 5.;
  var gblFadeSeconds = 1.;
  var gblRotations = 0.5;
  var seqno = 0;
  var lastno = 0;

  // End Customization section
  
  var gblDeckSize = gblImg.length;
  var gblDeckSize1 = gblDeckSize - 1;
  var gblOpacity = 100;
  var gblStartImg;
  var gblImageRotations = gblDeckSize * (gblRotations+1);
  var myA, myB, myBackup, i;

	for (i=0; i<100; i++){
		myA = Math.floor( Math.random() * gblDeckSize1 );
		myB = Math.floor( Math.random() * gblDeckSize1 );
		myBackup = gblImg[myA];
		gblImg[myA] = gblImg[myB];
		gblImg[myB] = myBackup;
	}

	seqno = 0;
  window.onload = photoShufflerLaunch;
  
  function photoShufflerLaunch()
  {
  	var theimg = document.getElementById(gblPhotoShufflerImgId);
        gblStartImg = theimg.src; // save away to show as final image

	document.getElementById(gblPhotoShufflerDivId).style.backgroundImage=
		'url(http://ontheway.qee.jp/wp-content/themes/random-image/images/Ontheway'
	         + gblImg[seqno] + '.jpg)';
	setTimeout("photoShufflerFade()",gblPauseSeconds*1000);
  }
  function photoShufflerFade()
  {
  	var theimg = document.getElementById(gblPhotoShufflerImgId);
    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;
	  setOpacity0(theimg,gblOpacity);
	  setTimeout("photoShufflerFade()",30);  // 1/30th of a second
	}
  }

  function photoShufflerShuffle()
  {
	var thediv = document.getElementById(gblPhotoShufflerDivId);
	var theimg = document.getElementById(gblPhotoShufflerImgId);
	var $i;
	
	// copy div background-image to img.src
	theimg.style.backgroundImage =
	    'url(http://ontheway.qee.jp/wp-content/themes/random-image/images/Ontheway'
	     + gblImg[seqno] + '.jpg)';
	// set img opacity to 100
	setOpacity0(theimg,100);

	if ( ++seqno >= gblDeckSize ) { seqno = 0; }

	// decrement rotation counter
	// slide next image underneath
	thediv.style.backgroundImage=
		'url(http://ontheway.qee.jp/wp-content/themes/random-image/images/Ontheway'
	     + gblImg[seqno] + '.jpg)';
  }

  function setOpacity0(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;
  }