// JavaScript Document

var intervalHandler;
function slideshow() {
  document.getElementById("slider").style.left="0px";
  intervalHandler=setInterval("moveLeft()",20);
}
var a=0;

function moveLeft() {
  if (a<(-img_count*129)) a=0; 
  document.getElementById("slider").style.left= a+"px";
  a-=1;  
}

function stop() {
  clearInterval(intervalHandler);
}

function reset() {
  intervalHandler=setInterval("moveLeft()",20);
}