var m_iInterval;
var m_Height;
//window.onload = wl;
var iScroll=0;

var arrCursor = 0;

var arrMax;
window.onload=wl;

function wl() {
  m_iInterval = setInterval(ontimer, 1);
  var base = document.getElementById("jump_base");

  m_Height = base.offsetHeight;

  var divi = parseInt(m_Height/5);
  m_Height = divi*5;

  var td1 = document.getElementById("td1");
  var td2 = document.getElementById("td2");
  var td3 = document.getElementById("td3");


}

function ontimer() {
  var base = document.getElementById("jump_base");
  iScroll+=1;
  if (iScroll>(m_Height*2)) {
    iScroll=0;
    arrCursor++;
    if (arrCursor>arrMax)
      arrCursor=0;
    
  }
  if (iScroll==m_Height) {
    pause();
    m_iInterval = setTimeout(resume, 4000);
  }
  base.scrollTop=iScroll;
}
function pause() {
  clearInterval(m_iInterval);
}
function resume() {
  m_iInterval = setInterval(ontimer, 1);
}