Question : How can I optimize pictures for websites without loosing quality?

When using photoshop save for web, it works with some images but with others, for example maps, the quaily is bad, the lines look jagged, white lines in photos also look jagged. Is there any other software to be considered? If I save as gif instead of jpeg, they look better on screen but printing is not good. I need images that look sharp and print well.
Thanks

Answer : How can I optimize pictures for websites without loosing quality?

Does anyone know of that script? This question has not been resolved yet.

Thanks