var helpfulDiv = '';

  function LikeDislike(metaTable, metaID, answer)
  {
     helpfulDiv = 'likeDislike_' + metaTable + '_' + metaID;

     var url = '/JS/likeDislike.html';
     var urlParameters = 'metaTable=' + metaTable + '&metaID=' + metaID + '&answer=' + answer;

     var ajax  = new Ajax.Request(
         url,
         {
              method:     "post",
              parameters: urlParameters,
              onSuccess:  ProcessLikeDislike
         }
     );
  }

  function ProcessLikeDislike(result)
  {
     if (result.responseText.length && document.getElementById(helpfulDiv))
        document.getElementById(helpfulDiv).innerHTML = result.responseText;
  }