var ticker = null; /* ticker object */
function startticker(){
    ticker = new Ticker('ticker', 'tickerID', 1, 45);
    ticker.start();
}
function Ticker(name, id, shiftBy, interval)
{
  this.name     = name;
  this.id       = id;
  this.shiftBy  = shiftBy ? shiftBy : 1;
  this.interval = interval ? interval : 100;
  this.runId    = null;
  this.div = document.getElementById(id);
  // remove extra textnodes that may separate the child nodes
  // of the ticker div
  var node = this.div.firstChild;
  var next;
  while (node)
  {
    next = node.nextSibling;
    if (node.nodeType == 3)
      this.div.removeChild(node);
    node = next;
  }
  //end of extra textnodes removal
 
  this.left = 0;
  this.shiftLeftAt = this.div.firstChild.offsetWidth;
  this.div.style.height    = this.div.firstChild.offsetHeight;
  this.div.style.width = 100 * screen.availWidth;
  this.div.style.visibility = 'visible';
}
function startTicker()
{
  this.stop();
  
  this.left -= this.shiftBy;
  if (this.left <= -this.shiftLeftAt)
  {
    this.left = 0;
    this.div.appendChild(this.div.firstChild);
  
    this.shiftLeftAt = this.div.firstChild.offsetWidth;
  }
  this.div.style.left = (this.left + 'px');
  this.runId = setTimeout(this.name + '.start()', this.interval);
}
function stopTicker()
{
  if (this.runId)
    clearTimeout(this.runId);
    
  this.runId = null;
}
function changeTickerInterval(newinterval)
{
  if (typeof(newinterval) == 'string')
    newinterval =  parseInt('0' + newinterval, 10); 
    
  if (typeof(newinterval) == 'number' && newinterval > 0)
    this.interval = newinterval;
    
    this.stop();
    this.start();
}
/* Prototypes for Ticker */
Ticker.prototype.start = startTicker;
Ticker.prototype.stop = stopTicker;
Ticker.prototype.changeInterval = changeTickerInterval;