Array.prototype.max = function() {
    return Math.max.apply(null, this);
};

$(document).ready(function(){
    $("div.slideshow").each(function()
    {
        var slideshow = $(this);
        var selectedImage = 0;
        var maxSelectedImage = slideshow.find("img").length - 1;
 
        slideshow.css("position", "relative");
 
        slideshow.find("img")
                .css("position", "absolute")
                .css("top", 0)
                .css("left", 0)
                .hide();
 
        slideshow.find("img:eq("+selectedImage+")").show();
 
        var height = new Array();
        var width = new Array();
        slideshow.find("img").each(function(i){
            var currentImg = $(this);
            height[i] = currentImg.height();
            width[i] = currentImg.width();
            i++;
        });
 
        slideshow.css('height', height.max());
        slideshow.css('width', width.max());
        
        var advanceSlideshow = function()
        {
            var newSelectedImage = selectedImage + 1;
            if(newSelectedImage > maxSelectedImage)
                newSelectedImage = 0;
 
            slideshow.find("img:eq("+selectedImage+")").fadeOut();
            slideshow.find("img:eq("+newSelectedImage+")").fadeIn();
 
            selectedImage = newSelectedImage;
 
            setTimeout(advanceSlideshow, 2000);
        };
        setTimeout(advanceSlideshow, 2000);
    });
});