function changeImage(newName)
{
   image = document.getElementById("anim");
   image.src = newName;
}

function go(value)
{
   newValue = 1 + value;

   changeImage(value + ".jpg");

   if(newValue <= 13)
   {
      window.setTimeout("go(" + newValue + ");", 300);
   }
   else
   {
      window.setTimeout("changeImage('1.jpg');", 1200);
      window.setTimeout("start();", 600);
   }
}

function start()
{
   window.setTimeout("go(1);", 600);
}