How do I a form submit without losing page parametes on other portlets?

Question

I have a page with several portlets. How can I make one of the portlets do a form submit without losing page parameters in other portlets?
If I do a submit only the controls in the form I have submitted are passed which means I loose parameters that where passed earlier.
I looked at the code the portal uses for the next button and I see that it does a POST with the action being the complete current URL with existing parameters. When I do this I cannot access the form variables in my dynamic page.

Answer 1

There are 3 steps to the balancing act of image weight (file size) vs image quality
1) image dimensions (on screen height x width measured in pixels is all that counts). Smaller dimensions = smaller file size.
2) compressed file type (JPEG for photos, PNG or GIF for everything else). Choose the right file type for your image.
3) quality of the final compressed image - visually comparing the final image for "acceptableness" (less artifacts) vs final file size
There are plenty of tutorials online
http://inobscuro.com/tutorials/read/35/
http://sixrevisions.com/web_design/comprehensive-guide-saving-images-for-web/