Ability to get source field in webstore order

The script below should be deployed as a user event script on after submit event of Sales Order record.

-Go to Customization > Scripting > Scripts > New > User Event

-Select the script and on After Submit Event, input  sofield_AfterSubmit

-Under Deployments Tab, select Sales Order, Released=Yes.

-Save.

function sofield_AfterSubmit(type)
{
        var order;
        try
        {
        if ((type == 'create') || (type == 'edit'))
        {
        order = nlapiLoadRecord(nlapiGetRecordType(),nlapiGetRecordId());
        var source = order.getFieldValue('source');
        var entity = order.getFieldValue('entity');
        nlapiLogExecution('DEBUG', 'after submit source: ', source);
        nlapiLogExecution('DEBUG', 'after submit entity: ', entity);
        }
        }
        catch (e )
        {
        if (e instanceof nlobjError )
            nlapiLogExecution('ERROR', 'system error', e.getCode() + '\n' + e.getDetails() )
        else
        nlapiLogExecution('ERROR', 'unexpected error', e.toString() )
        }
}