function zakladka(param) {
   document.getElementById('link-strony').className='';
   document.getElementById('link-blog').className='';
   document.getElementById('link-forum').className='';

   document.getElementById('adr-strony').style.display='none';
   document.getElementById('adr-blog').style.display='none';
   document.getElementById('adr-forum').style.display='none';

   document.getElementById('link-'+param).className='active';
   document.getElementById('adr-'+param).style.display='';
}
function zakladka2(param) {
   var i;
   for(i = 1; i < 10; i++) {
      try {
         document.getElementById('link'+i).className='';
         document.getElementById('adr'+i).style.display='none';
      }
      catch(e) { break; }
   }
   document.getElementById('link'+param).className='active';
   document.getElementById('adr'+param).style.display='';
}