var rnd = Math.random()*10000000000000000;
var div = 70;
var pos = 20;
var pause = false;
var nullmode = false;

mode1 = (document.all) ? 1 : 0;
mode2 = (!document.all && document.getElementById) ? true : false;
if (parseInt(navigator.appVersion) <= 4) {
  if (navigator.appName == "Netscape") {
    nullmode = true;
  }
}
if (navigator.appVersion.indexOf('Mac') != -1) {
  nullmode = true;
}
if (mode1) {
  var bf = document.all.br;
} else if (mode2) {
  var bf = document.getElementById("br");
}
function scrollBlock() {
  if (!pause) {
    if (pos < -bf.offsetHeight) {
      pos = div;
    } else {
      pos -= 1;
    }
    bf.style.top = pos;
  }
}
function pauseScroll() {
  pause = true;
}
function resumeScroll() {
  pause = false;
}
if (!nullmode) {
  setInterval("scrollBlock()",50);
}