I'm using the example below and have a question about how best to pass a URL param value to get_users.php
to apply criteria to the query in get_users.php.  Thanks   

$('#dg').edatagrid({ 
        url: 'get_users.php', 
        saveUrl: 'save_user.php', 
        updateUrl: 'update_user.php', 
        destroyUrl: 'destroy_user.php' 
    });