//a function to help click a specific button when return is hit (.NET makes it difficult to change the default button depending on where you are in a form)
function fnClickButton(e, strButtonID)
{ 
      var evt = e ? e : window.event;
      var btn = document.getElementById(strButtonID);
      if (btn)
      { 
          if (evt.keyCode == 13)
          { 
                btn.click(); 
                return false; 
          } 
      } 
}