function MainAppear(phase){
   title_suffix = 'Persal.org - ';
   if(window.PG_dst != 0 && window.FL_bypass == 0){
      phase = window.PG_dst;
      window.FL_bypass = 1;
   }
   switch(phase){
      case 1: url = 'home.php'; title = 'Main Page'; break;
case 2: url = 'services.php'; title = 'Services'; break;
case 3: url = 'dcc.php'; title = 'DCC'; break;
case 4: url = 'architecture.php'; title = 'Architecture'; break;
case 5: url = 'web.php'; title = 'Web'; break;
case 6: url = 'cv.php'; title = 'CV Matteo Perelli'; break;
case 7: url = 'gstbk.php'; title = 'Guestbook'; break;
case 8: url = 'phospholipase.php'; title = 'DCC - Phospholipase'; break;
case 9: url = 'pgex.php'; title = 'DCC - pGEX1'; break;
default: url = 'home.php'; title = 'Main Page'; break;

   }
   window.DOC_title = title_suffix + title;
   document.title   = window.DOC_title;
   new Ajax.Updater('main_contents', url, {method: 'get', evalScripts: true});
   if(document.getElementById('main_contents').style.display == 'none'){
      new Effect.Appear('main_contents', {duration:1});
   }
}