Fossil

            else td.scrollIntoView(false);
          }
          return true;
        }
      }
      return false;
    }
    function focusCacheInit(){
      var e = document.getElementById('timeline-kbfocus');
      if( !e ){
        e = document.createElement('input');
        e.type = 'text';
        e.style.display = 'none';
        e.style.visibility = 'hidden';
        e.id = 'timeline-kbfocus';
        document.body.appendChild(e);
      }
    }
    function focusCacheGet(){
      var e = document.getElementById('timeline-kbfocus');
      return e ? e.value : null;
    }
    function focusCacheSet(v){
      var e = document.getElementById('timeline-kbfocus');
      if( e ) e.value = v;
    }
    focusCacheInit();
    document.addEventListener('keydown',function(evt){
      if( evt.target.tagName=='INPUT' ) return;
      var
        kNEXT = 78 /* N */,
        kPREV = 77 /* M */,
        kTMLN = 74 /* J */,
        kVIEW = 75 /* K */,
        kDONE = 76 /* L */,
        mod = evt.altKey<<15 | evt.ctrlKey<<14 | evt.shiftKey<<13,
        key = ( evt.which || evt.keyCode ) | mod;
      var dx = 0;
      if( key==kPREV ) dx++;
      else if( key==kNEXT ) dx--;
      else if( key!=kTMLN && key!=kVIEW && key!=kDONE ) return;

      if( key==kDONE ){

        focusCacheSet(null);
        focusVisualize(null,false);
        document.cookie =
          'fossil_timeline_kbnav=;expires=Thu, 01 Jan 1970 00:00:01 GMT;path=/';
        return;
      }
      document.cookie = 'fossil_timeline_kbnav=1;path=/';
      var id = focusCacheGet();
      if( id && dx==0 ){
        var ri = timelineGetRowInfo(id);
        if( ri ){
          var page = key==kVIEW ? '/info/' : '/timeline?c=';
          var href = ri.baseurl + page + encodeURIComponent(ri.hash);
          if( href!=location.href.slice(-href.length) ){
            location.href = href;

          var btn =
            document.querySelector('.tl-button-' + ( dx>0 ? 'prev' : 'next' ));
          if( btn ) btn.click();
          return;
        }
      }
      else if ( !id ) id = focusDefaultId();
      focusCacheSet(id);
      focusVisualize(id,true);
    }/*,true*/);
    window.addEventListener('pageshow',function(evt){
      var id = focusCacheGet();


      if( !id || !focusVisualize(id,false) ){
        if( document.cookie.match(/fossil_timeline_kbnav=1/) ){
          id = focusDefaultId();
          focusCacheSet(id);
          focusVisualize(id,false);
        }
      }
    },false);
  },false);
}());