Can I please have some help to call a PHP file via Javascript when an HTML page has successfully loaded.

Here is my code:

```
    <script class="code" type="text/javascript">

        $(document).ready(function(){
            //Call fb_marketing.php 
        });

    </script>

```

The name of the PHP file is 'fb\_marketing.php'. Can I please have some help to get this code working?

Thanks in advance