function choosePositionAndFade(){

        if(imgToFade > IMAGE_POSITIONS) imgToFade = 1;
        if(nextImg >= images.length) nextImg = 0;

        fadeImage('image_' + imgToFade, images[nextImg]);

        imgToFade++;
        nextImg++;
    }

    function fadeImage(origImgId, newImgSrc){

        var img1 = $('#'+origImgId);
        var origImgSrc = img1.attr('src');
        var pos = img1.offset();
        
        //Add copy of image on top of original
        var img = $('<img src="' + origImgSrc + '" />').css(
            {
            'position':'absolute',
            'top':pos.top,
            'left':pos.left,
            'zIndex':0
            }
        ).appendTo($('body'));

        //Set the original image src to the at of the new image
        img1.attr('src', newImgSrc);

        //Fade copy out to reveal "new" image underneath
        img.fadeOut(1000, function(){ img.remove(); });
    }