function myToggleDiv(contentDiv, headerDiv, openStyle, closeStyle)
{
  toggleDiv(contentDiv) ;
  toggleClass(headerDiv, openStyle, closeStyle) ;
}

function toggleClass(itemId, openStyle, closeStyle)
{
  var obj = DOM.resolve(itemId) ;
  if (obj)
    if (obj.className == openStyle)
      obj.className = closeStyle ;
    else
      obj.className = openStyle ;
}

function toggleDiv(divId)
{
  var obj = DOM.resolve(divId) ;
  if (obj)
    if (obj.style.display == 'none')
    {
      obj.style.display = 'block';
    }
    else
    {
      obj.style.display = 'none';
    }
}