function toggleScreenshots(index){
    var screenshots = $('.screenshot');
    if (index == screenshots.length){index=0;};
    for (var i=0; i<screenshots.length; i++){
	if (i == index){
	    $(screenshots[i]).show();
	}
	else{
	    $(screenshots[i]).hide();
	}

    }
    index +=1;
    return index;
}

$(function(){
      var index = 0;
      var all = $('.screenshot');
      setTimeout(function(){
		     setInterval(function(){
				     index = toggleScreenshots(index);
				 },
				 1500);
		 },
		 0);
  });