function update(port, account, pg) {
  $.get( "http://cloud.mytt.co.uk/backend/include/getinfo.php", { f: port + "-" + account + "-" + pg }).done(function( data ) {
    var currentData = $('#autoUpdate' + port).html();
    if(currentData != data) {
        $('#autoUpdate' + port).html(data);
    }
    setTimeout(update(port, account, pg), 1000);
  });
}

<script>update("'.$port.'","'.$account.'","'.$pagenum.'");</script>

This translates to update("28500","Admin","1"); when the page is loaded.