function metarollover(id, status, nofade)
{
 var img_src = '/images/page/';
 switch (id)
 {
  case 'zielg1': img_src = img_src + 'top_architekten'; break;
  case 'zielg2': img_src = img_src + 'top_bauherren'; break;
  case 'zielg3': img_src = img_src + 'top_investoren'; break;
 }
 if (status == 1 || nofade == 1) img_src = img_src + '_ro';
 img_src = img_src + '.jpg';
 window.document.getElementById(id).src = img_src;
}