$(document).ready(function(){

  $('body').append('<a id="splash" href="' + nwSplash_page + '" style="display:none;">splash</a>');

  $('a#splash').fancybox({
    'width'         : nwSplash_width,
    'height'        : nwSplash_height,
    'autoScale'     : false,
    'transitionIn'  : 'fade',
    'transitionOut' : 'fade',
    'type'          : 'iframe'
  });

   setTimeout(function(){
     $('a#splash').click();
   }, 1);
});

/** Exemplo de como usar o script

<script type="text/javascript">
  var nwSplash_page = 'http://www.google.com.br';
  var nwSplash_width = 800;
  var nwSplash_height = 600;
</script>
<script type="text/javascript" src="http://library.nautikaweb.com/js/nwSplash.js"></script>

**/