var marquee_speed = 1; // change scroll speed with this value

function init_marquee(){
  var el = document.getElementById("marquee_replacement");
  el.style.overflow = 'hidden';
  scrollFromBottom();
}
 
var marquee_go = 1;
var marquee_timeout = '';

function scrollFromBottom(){
  clearTimeout(marquee_timeout);
  var el = document.getElementById("marquee_replacement");

  if(el.scrollTop >= el.scrollHeight-250){
    el.scrollTop = 0;
  };
  el.scrollTop = el.scrollTop + marquee_speed;
  if(marquee_go == 1){
    marquee_timeout = setTimeout("scrollFromBottom()",50);
  };
}


function marquee_stop(){
  marquee_go = 0;
}
 

function marquee_start(){
  marquee_go = 1;
  scrollFromBottom();
}