var scrollInterval
function ticker(difference) {
  if (document.body.scrollHeight-document.body.scrollTop<=document.body.clientHeight)
  {
  scroll(0,0);
  } else
  {
scroll(0,document.body.scrollTop+difference);
  }
}

function runticker() {
    if(scrollInterval!=null)
	clearInterval(scrollInterval)
    scrollInterval = setInterval( "ticker(1)", 60);
}
function slowticker() {
if(scrollInterval!=null)
	clearInterval(scrollInterval)
    scrollInterval = setInterval( "ticker(2)", 2000);
}