/**
* Randomly select an ad
*
* @param array
* A list of ad HTML entities that will be outputed when
* selected randomly
*
* @access public
*/
function newsysGetRandomAd( aAds )
{
   if (aAds.length > 0) {
		
      var randNumber = Math.random()*(aAds.length-1);
      document.write(aAds[Math.round(randNumber)]);

   }
}