function changeBG()
{
  var id = $('body').data('bg');
  var url = 'img/header_' + id + '.jpg';
  $('#header').loadBGImage(url);  
}
  
$(document).ready(function () 
{
  setTimeout ( 'changeBG()', 1000 );
  $('.tease').pixelHover();
  $('.nav').navHover();
});