var text = 0;

var message=new Array();
  message[0] = "The Temperature right now is 12.2 c"
  message[1] = "The Total Rainfall so far today is 30.9 mm"
  message[2] = "The Rain is Falling at  3.6 mm/hr"  
  message[3] = "The Wind is blowing at 12.2 km/h "
  message[4] = "The Barometer is reading 1009.1 hPa"
  message[5] = "Strongest Wind Gust today was 24.5 km/h"  

function changeText() {
  if (message.length > 0) {
    document.change.descript.value=message[text];
    text++;
  }
  if (text == 6) {text = 0; }  // change the # 4 at the left to the maximum # of message lines you want included
    window.setTimeout("changeText()", 4000); }  // 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();
});