(function ($) {

  Drupal.behaviors.frontpagePeople = {
    attach: function (context) {
      var images = ['people1.png', 'people2.png', 'people3.png', 'people4.png', 'people5.png'];
      $('#block-block-1').css({'background-image': 'url(' + Drupal.settings.basePath + 'sites/all/themes/hope/images/' + images[Math.floor(Math.random() * images.length)] + ')'});
    }
  };

})(jQuery);;