function showBillboard( id ){
  $$('.title_entry').each( function(el){
    el.removeClass('title_sel');
  });
  $('title_entry_'+ id ).addClass('title_sel');
  $$('.chartlist').each( function(el){
    el.setStyle('display', 'none');
  });
  $('items_'+id ).setStyle('display', 'block');
}

function assignlink( bid, tid, artist_name, album_track_name ){
 var title_name = artist_name + ' - ' + album_track_name;
 $('title_'+bid+'_'+tid).href = '/musicsearch/' + title_name;
 $('track_'+bid+'_'+tid).href = '/musicsearch/' + title_name;
 $('listen_'+bid+'_'+tid).href = '/musicsearch/' + title_name;
 $('itunes_'+bid+'_'+tid).href = "itms://phobos.apple.com/WebObjects/MZSearch.woa/wa/search?WOURLEncoding=ISO8859_1&lang=1&output=lm&country=US&term=\"" +
    encodeURIComponent( artist_name ) + "+-+" + encodeURIComponent( album_track_name ) + "\"";
 $('amazon_'+bid+'_'+tid).href = "http://www.amazon.com/s/ref=nb_ss_gw?url=search-alias%3Dpopular&field-keywords=" +
    encodeURIComponent( artist_name ) + "+-+" + encodeURIComponent( album_track_name )
}