From the museum website:
|New: Image database of the old master paintings
You can use this database to browse through the entire collection of old master paintings. Low resolution images (72dpi) can be downloaded directly free of charge for research, education and other non-commercial purposes. This image database can also be used to order digital images (high resolution – 300 dpi) for high quality printing purposes.
Copy this link to your internet browser: http://fhm.imagedatabase.nl