$(document).ready(function(){
 
  // setup image zoom
       var initZoomer = window.setupZoom || function(){};
       initZoomer();
 
  // hide unused promos
  var promos = $('.section.promo');
  var rnd = Math.floor(Math.random() * promos.length);
  promos.filter(function(i){ return i != rnd; }).hide();
 
  // hide books
  var books = $('#our-books li');
  if(books.length>0)
  {
    var rnd1 = Math.floor(Math.random() * books.length);
    var rnd2;
    do{
      rnd2 = Math.floor(Math.random() * books.length);
    }while (rnd2 == rnd1)
    books.filter(function(i){ return i != rnd1 && i != rnd2 ; }).hide();
  }
 
  // set up scrollTo
  $.localScroll();
});