Easy Backstretch update: added preload

gistfile1.php

<script type="text/javascript">
        jQuery(document).ready(function($) {
        var images = [];
        <?php foreach($easy_backstretch_images as $image => $data): ?>
        images.push('<?php echo $data['file_url']; ?>');
        <?php endforeach; ?>
        var index = 0;
        var backstretchSettings = { fade: <?php echo $easy_backstretch_settings['fade']; ?>, duration:<?php echo $easy_backstretch_settings['duration'];?>};
        var len = images.length;
        var totalDuration = (backstretchSettings.fade + backstretchSettings.duration);
        var timer = null;

 var preload = function() {
    for( var i = 0; i < images.length; ++i ) {
         var img = document.createElement( 'img' );
         var src = images[i];
         img.src = src;
    }
};
        var rotate = function() {
            $('<?php echo $easy_backstretch_settings["div"]; ?>').backstretch(images[0], backstretchSettings);
            timer = setInterval(function() {
                index++;
                if(index == len) {
                    index = 0;
                }
                $('<?php echo $easy_backstretch_settings["div"]; ?>').backstretch(images[index], backstretchSettings);     
            }, totalDuration); 
        };
  $.when( preload() ).done(
        rotate() );
        });
        </script>