var text = 0;

var message=new Array();
  message[0] = "Use AVG 9 for Virus Protection"
  message[1] = "Use Spybot 1.6.2 for Spyware Protection"
  message[2] = "Use Malwarebytes as an added precaution"
  message[3] = "Have fun and but be careful out there."

function changeText() {
  if (message.length > 0) {
    document.change.descript.value=message[text];
    text++;
  }
  if (text == 4) {text = 0; }  // change the # 4 at the left to the maximum # of message lines you want included
    window.setTimeout("changeText()", 3500); }  // change the # on the left to adjust the speed of the
                                               // scroll. The smaller the # the faster the speed
function addLoadEvent(func) {
  var oldonload = window.onload;
  if (typeof window.onload != 'function') {
    window.onload = func;
  } else {
    window.onload = function() {
      if (oldonload) {
        oldonload();
      }
      func();
    }
  }
}

addLoadEvent(function() {
  changeText();
});