function spin( obj )
{
  var spinner = document.getElementById( obj );
  var spinner_content = document.getElementById( obj+"_body" );
  if ( spinner_content.style.visibility == 'visible' )
  {
    spinner.innerHTML = '<img src=\"upload/images/open.gif\" alt=\"open\" title=\"mehr Infos\" />';
    spinner_content.style.visibility = 'hidden';
    spinner_content.style.height = '0px';
    spinner_content.style.margin = '0px';
  }
  else
  {
    spinner.innerHTML = '<img src=\"upload/images/close.gif\" alt=\"close\" title=\"weniger Infos\" />';
    spinner_content.style.visibility = 'visible';
    spinner_content.style.height = 'auto';
    spinner_content.style.margin = '10px 10px 20px 20px';
  }
}