slideshow_time = getCookie('slideshow_time');
var current_slideshow_time = slideshow_time?slideshow_time:4;
var current_slideshow_controller = 'play';
var play_next_time = false;
var current_product_id=0;
var timeout;

var img_play = new Image();
img_play.src='/images/slideshow/play.gif';
var img_next = new Image();
img_next.src='/images/slideshow/pause.gif';

function slideshow(todo, product_id) {
  switch(todo) {
    case 'faster':
      if(current_slideshow_time>1) {
        current_slideshow_time--;
        document.getElementById('slideshow_time').innerHTML = current_slideshow_time;
        setCookie('slideshow_time', current_slideshow_time, 100);
      }
      break;

    case 'slower':
      if(current_slideshow_time<20) {
        current_slideshow_time++;
        document.getElementById('slideshow_time').innerHTML = current_slideshow_time;
        setCookie('slideshow_time', current_slideshow_time, 100);
      }
      break;

    case 'controller':
      var sc = document.getElementById('slideshow_controller');
      if(current_slideshow_controller == 'play') {
        sc.src = img_next.src;
        sc.title = 'Pause';
        current_slideshow_controller = 'pause';
        current_product_id = product_id;
        timeout = setTimeout("play()", current_slideshow_time*1000);
      }
      else {
        sc.src = img_play.src;
        sc.title = 'Play';
        current_slideshow_controller = 'play';
        clearTimeout(timeout);
      }
      break;
  }
}

function play() {
  window.location.href='/product.php?view=next&slideshow=play&product_id='+current_product_id;
}