Sets up keyboard shortcuts for placing bookmarks and navigation inside webpage.
当前为
| You can save current position in displayed webpage using shortcuts Shift-Alt-0?9; later, you may return to saved position by pressing Alt -0‥9. Markers created in this way are kept in browser's persistent memory and they will be restored next time you open the page. |

NOTES:
var kJump = kWin; /* win-digit for jump */
var kMark = kWin+kShift; /* win-shift-digit for mark */
or even so:
var kJump = 0; /* just hit a digit key to jump */
var kMark = kShift; /* and shift+digit to mark */
