/**
 * Switch object visibility
 *
 * @param   string   id of the object to be shown
 * @param   string   id of the object to be hidden
 *
 * @return  boolean  whether to run the action or not
 */
function change_visibility( showId, hiddId )
{
  if (document.getElementById(showId).className == 'hidden')
    document.getElementById(showId).className = '';
  else
    document.getElementById(showId).className = document.getElementById(showId).className.replace(' hidden', '');
  document.getElementById(hiddId).className += ' hidden';
  return false;
} // end of the 'change_visibility()' function

function show_more_info()
{
  return change_visibility('more_info', 'no_more_info');
}