function OrderedList(strID)
{
   objOL = document.getElementById(strID);
   this._arrListItems = objOL.getElementsByTagName("div");
}

OrderedList.prototype.ListItems = function()
{
    return this._arrListItems;
}

OrderedList.prototype.BlackOut = function()
{
  for(i = 0; i < objOL.ListItems().length; i++)
  {
     objOL.ListItems()[i].style.background = '#fff';
  }
}

OrderedList.prototype.HighlightItem = function(iIndex)
{
   this.BlackOut();
   this.ListItems()[iIndex - 1].style.background = '#fff580';
}

//window.onload = function()
//{
//  objOL = new OrderedList("olCallouts");
//}

function InstantiateOrderedList()
{
  objOL = new OrderedList("olCallouts");
}

AddLoadEvent(InstantiateOrderedList);