loading a form's action page without having to use a submit button

Hi,
How do I make a form in a php file load the action page just by clicking the list item in a listbox included in the form, without having to use a submit button. Thank you very much for replying.

I think you have to use javascript (submit()) - but don't forget that there are people out there without javascript

Yep, thats javascript alright (or flash or anything that I consider client side).
Just make sure it also works without the javascript; javascript should be used for shortcuts, but IMO its no good for complete control.