var totalSlides = 0;
 var currentSlide = 1;
 var contentSlides = "";

 $(document).ready(function(){
   $("#slideshow-previous").click(showPreviousSlide);
   $("#slideshow-next").click(showNextSlide);
   $("#slideshow-first").click(showFirstSlide)

   var totalWidth = 0;
   contentSlides = $(".slideshow-content");
   contentSlides.each(function(i){
     totalWidth += this.clientWidth;
     totalSlides++;
   });
   $("#slideshow-holder").width(totalWidth);
   $("#slideshow-scroller").attr({scrollLeft: 0});
   updateButtons();
 });

function showPreviousSlide()
{
  currentSlide--;
  if (currentSlide < 1) currentSlide = totalSlides;
  updateContentHolder();
  updateButtons();
 }

 function showNextSlide()
 {
   currentSlide++;
   if (currentSlide > totalSlides) currentSlide = 1;
   updateContentHolder();
   updateButtons();
 }
 
 function updateCounter() {
    $('#slideshow-counter').html(currentSlide + "/" + totalSlides);
}

function showFirstSlide()
{
  currentSlide=1;
  updateContentHolder();
  updateButtons();
}

 function updateContentHolder()
 {
   var scrollAmount = 0;
   contentSlides.each(function(i){
     if(currentSlide - 1 > i) {
       scrollAmount += this.clientWidth;
     }
  });
  $("#slideshow-scroller").animate({scrollLeft: scrollAmount}, 1000);
 }

function updateButtons()
{
  if(currentSlide < totalSlides) {
    $("#slideshow-next").show();
  } else {
    $("#slideshow-next").hide();
  }
  if(currentSlide > 1) {
    $("#slideshow-previous").show();
  } else {
    $("#slideshow-previous").hide();
  }
  updateCounter();
  
  if(currentSlide < totalSlides) {
    $("#slideshow-first").show();
  } else {
    $("#slideshow-first").hide();
  }
  if(currentSlide > 1) {
    $("#slideshow-first").show();
  } else {
    $("#slideshow-first").hide();
  }
}