<script>
$(document).ready( function() {
    var height = $(window).height();
    var width = $(window).width();
    $.ajax({
        url: 'index.php',
        type: 'post',
        data: { 'width' : width, 'height' : height, 'recordSize' : 'true' },
        success: function(response) {
            $("body").html(response);
        }
    });
});
</script>

<?php echo $width = $_POST['width'];

?>
<?php
if(isset($_POST['recordSize'])) {
$height = $_POST['height'];
$width = $_POST['width'];
$_SESSION['screen_height'] = $height;
$_SESSION['screen_width'] = $width;
//Any html you want returned in here

 if(($_SESSION['screen_width']>1024)) {
echo include "include/slider-nivo1.php";
 }

 }
?>