mSHIFT = 1<<13,
        kFRST = mSHIFT | 78 /* SHIFT+N */,
        kNEXT = 78 /* N */,
        kPREV = 77 /* M */,
        kLAST = mSHIFT | 77 /* SHIFT+M */,
        kCYCL = 72 /* H */,
        kTICK = 188 /* , */,
        kUNTK = mSHIFT | 188 /* , */,
        kCPYH = 66 /* B */,
        kCPYB = mSHIFT | 66 /* SHIFT+B */,
        kTMLN = 74 /* J */,
        kVIEW = 75 /* K */,
        kDONE = 27 /* ESC */,
        mod = evt.altKey<<15 | evt.ctrlKey<<14 | evt.shiftKey<<13,
        key = ( evt.which || evt.keyCode ) | mod;
      var dx = 0;
      switch( key ){
        case kFRST: dx = -2; break;
        case kNEXT: dx = -1; break;
        case kPREV: dx = +1; break;
        case kLAST: dx = +2; break;
        case kCYCL: break;
        case kTICK: break;
        case kUNTK: break;
        case kCPYH: break;
        case kCPYB: break;
        case kTMLN: break;
        case kVIEW: break;
        case kDONE: break;
        default: return;
      }

          else if( id==cur ) id = tik || sel || cur;
          else if( id==tik ) id = sel || cur || tik;
          else id = sel || cur || tik || id;
        }
        else if( key==kTICK ){
          var gn = document.getElementById('tln'+id.slice(1));
          if( gn ) gn.click();
        }
        else if( key==kUNTK ){
          var tid = focusTickedId();
          if( tid ){
            var gn = document.getElementById('tln'+tid.slice(1));
            if( gn ) gn.click();
          }
        }
        else if( key==kCPYH || key==kCPYB ){
          var ri = timelineGetRowInfo(id);
          if( ri ){
            copyTextToClipboard(
              key==kCPYH ? ri.hash.slice(0,ri.hashdigits) : ri.branch);
          }