$(document).ready( function() {
  $('[default]').defaultTextField();

  var nav = $('#info_header');
  var quake = nav.find('#quake').jrumble( {
    rumbleEvent: 'triggered',
    rumbleSpeed: 25,
    rangeX: 0.5,
    rangeY: 0.5,
    rangeRot: 0.5
  } );
  nav.hover(
    function() {
      quake.trigger('rumble:start');
    },
    function() {
      quake.trigger('rumble:stop');
    }
  );
} );