function zakladka(id, param) {
   document.getElementById('link-strony-'+id).className='change';
   document.getElementById('link-blog-'+id).className='change';
   document.getElementById('link-forum-'+id).className='change';
   document.getElementById('strony-'+id).className='none';
   document.getElementById('blog-'+id).className='none';
   document.getElementById('forum-'+id).className='none';
   document.getElementById('link-'+param+'-'+id).className='change choose-tab-hover';
   document.getElementById(param+'-'+id).className='none tab-hover';
}