Infinite Scroll and Masonry

function custom_masonry_js() { ?>
<script type="text/javascript">

  jQuery(document).ready(function(){

    var $container = jQuery('#sort');

    $container.imagesLoaded(function(){
      $container.masonry({
        itemSelector: '.box',
        columnWidth: 100
      });
    });

    $container.infinitescroll({
      navSelector  : '.navigation',    // selector for the paged navigation
      nextSelector : '.navigation .nav-previous a',  // selector for the NEXT link (to page 2)
      itemSelector : '.box',     // selector for all items you'll retrieve
      loading: {
          finishedMsg: 'No more pages to load.',
          img: 'http://www.stemtechtestimonials.com/wp-content/themes/shaken-grid-free/images/ajax-loader.gif'
        }
      },
      // trigger Masonry as a callback
      function( newElements ) {
        // hide new items while they are loading
        var $newElems = jQuery( newElements ).css({ opacity: 0 });
        // ensure that images load before adding to masonry layout
        $newElems.imagesLoaded(function(){
          // show elems now they're ready
          $newElems.animate({ opacity: 1 });
          $container.masonry( 'appended', $newElems, true );
        });
      }
    );

  });
</script>
    <?php
}