function Slideshow(slideshow, timeout, duration_time) {
  //duration_time = duration_time / 1000;
 
  this.duration_time = duration_time;  
  this.slides = [];
  var nl = $(slideshow).getElementsByTagName('div');
  for (var i = 0; i < nl.length; i++) {
    if (Element.hasClassName(nl[i], 'slide')) {
      this.slides.push(nl[i]);
    }
  }
  this.timeout = timeout;
  this.current = 0;

  for (var i = 0; i < this.slides.length; i++) {
    this.slides[i].style.zIndex = this.slides.length - i;
  }

  Element.show(slideshow);
  setTimeout((function(){this.next();}).bind(this), this.timeout + 850);
}
Slideshow.prototype = {
  next: function() {
  
    //window.alert(this.duration_time);
    for (var i = 0; i < this.slides.length; i++) {
      var slide = this.slides[(this.current + i) % this.slides.length];
      slide.style.zIndex = this.slides.length - i;
    }

    Effect.Fade(this.slides[this.current], {
      duration: this.duration_time, afterFinish: function(effect) {
        effect.element.style.zIndex = 0;
        Element.show(effect.element);
        Element.setOpacity(effect.element, 1);
      }
    });
    
    this.current = (this.current + 1) % this.slides.length;
    setTimeout((function(){this.next();}).bind(this), this.timeout + 850);
  }
}

/*
var slideshow2_noFading = false;
var slideshow2_timeBetweenSlides = 5000;  // Amount of time between each image(1000 = 1 second)
var slideshow2_timeAfterPause = 100;  // Amount of time between each pause check (1000 = 1 second)
var slideshow2_fadingSpeed = 16; // Speed of fading   (Lower value = faster)

var slideshow2_galleryContainer; // Reference to the gallery div
var slideshow2_galleryWidth;  // Width of gallery
var slideshow2_galleryHeight; // Height of galery
var slideshow2_slideIndex = -1;  // Index of current image shown
var slideshow2_slideIndexNext = false; // Index of next image shown
var slideshow2_imageDivs = new Array();   // Array of image divs(Created dynamically)
var slideshow2_currentOpacity = 100;   // Initial opacity
var slideshow2_imagesInGallery = false;   // Number of images in gallery
var Opera = navigator.userAgent.indexOf('Opera')>=0?true:false;

var isPaused = false;

function createParentDivs(imageIndex)
{
	if(imageIndex==slideshow2_imagesInGallery)
	{
		showGallery();
	}
	else
	{
		var imgObj = document.getElementById('galleryImage' + imageIndex);
		if( Opera )
			imgObj.style.position = 'static';
		slideshow2_imageDivs[slideshow2_imageDivs.length] =  imgObj;
		imgObj.style.visibility = 'hidden'; 
		imageIndex++;
		createParentDivs(imageIndex);
	}     
}

function showGallery()
{
	if( slideshow2_slideIndex==-1 )
		slideshow2_slideIndex=0;
	else 
		slideshow2_slideIndex++; // Index of next image to show

	if( slideshow2_slideIndex==slideshow2_imageDivs.length )
		slideshow2_slideIndex=0;

	slideshow2_slideIndexNext = slideshow2_slideIndex+1;  // Index of the next next image
	if( slideshow2_slideIndexNext==slideshow2_imageDivs.length )
		slideshow2_slideIndexNext = 0;
   
	slideshow2_currentOpacity=100;   // Reset current opacity

	// Displaying image divs
	slideshow2_imageDivs[slideshow2_slideIndex].style.visibility = 'visible';
	if( Opera )
		slideshow2_imageDivs[slideshow2_slideIndex].style.display = 'inline';

	if( navigator.userAgent.indexOf('Opera')<0 )
	{
		slideshow2_imageDivs[slideshow2_slideIndexNext].style.visibility = 'visible';
	}
   
	if(document.all)
	{ // IE rules
		slideshow2_imageDivs[slideshow2_slideIndex].style.filter = 'alpha(opacity=100)';
		slideshow2_imageDivs[slideshow2_slideIndexNext].style.filter = 'alpha(opacity=1)';
	}
	else
	{
		slideshow2_imageDivs[slideshow2_slideIndex].style.opacity = 0.99; // Can't use 1 and 0 because of screen flickering in FF
		slideshow2_imageDivs[slideshow2_slideIndexNext].style.opacity = 0.01;
	}

	setTimeout('revealImage()',slideshow2_timeBetweenSlides);      
}

function revealImage()
{
	if( isPaused == true )
	{
		setTimeout('revealImage()',slideshow2_timeAfterPause);
	}
	else
	{
		if(slideshow2_noFading)
		{
			slideshow2_imageDivs[slideshow2_slideIndex].style.visibility = 'hidden';
			if( Opera )
				slideshow2_imageDivs[slideshow2_slideIndex].style.display = 'none';
			showGallery();
			return;
		}
		slideshow2_currentOpacity--;
		if(document.all)
		{
			slideshow2_imageDivs[slideshow2_slideIndex].style.filter = 'alpha(opacity='+slideshow2_currentOpacity+')';
			slideshow2_imageDivs[slideshow2_slideIndexNext].style.filter = 'alpha(opacity='+(100-slideshow2_currentOpacity)+')';
		}
		else
		{
			slideshow2_imageDivs[slideshow2_slideIndex].style.opacity = Math.max(0.01,slideshow2_currentOpacity/100);   // Can't use 1 and 0 because of screen flickering in FF
			slideshow2_imageDivs[slideshow2_slideIndexNext].style.opacity = Math.min(0.99,(1 - (slideshow2_currentOpacity/100)));
		}

		if(slideshow2_currentOpacity>0)
		{
			setTimeout('revealImage()',slideshow2_fadingSpeed);
		}
		else
		{
			slideshow2_imageDivs[slideshow2_slideIndex].style.visibility = 'hidden';   
			if( Opera )
				slideshow2_imageDivs[slideshow2_slideIndex].style.display = 'none';     
			showGallery();
		}
	}
}

function initImageGallery()
{
	slideshow2_galleryContainer = document.getElementById('imageSlideshowHolder');
	slideshow2_galleryWidth = slideshow2_galleryContainer.clientWidth;
	slideshow2_galleryHeight = slideshow2_galleryContainer.clientHeight;
	galleryImgArray = slideshow2_galleryContainer.getElementsByTagName('IMG');
	for(var no=0;no<galleryImgArray.length;no++)
	{
		galleryImgArray[no].id = 'galleryImage' + no;
	}
	slideshow2_imagesInGallery = galleryImgArray.length;
	createParentDivs(0);    
}

function pauseGallery()
{
	isPaused = true;
}

function resumeGallery()
{
	isPaused = false;
//	revealImage();
}
*/