Determining periods between dates

Hi Friends

This question is regarding determinations of periods between two dates.

For example,

Start date = 01/01/2005

End date = 07/31/2005

I want to populate a internal table, which consists of all months (periods) based on the start date and end date as follows

200501

200502

200503

200504

200505

200506

200507

Is there any standard Function module available to do this? What is the best way to do this?

Thanks

Hari