Which type of submit button to use?

Hi All,

I am struggling with a form which executes BAPI script when user clicks submit. My submit button doesnt do any action for some reason. I dont know if the problem is in the type of submit button am using. Can someone please tell me what is the exact kind of button I need to use?

I see Email Submit button, HTTP Submit button, (just) Button, and there are various categories in Insert Menu like Webdynpro ActiveX, Webdynpro Native etc. If someone can tell me exactly, I would appreciate. Am using developer workplace, Webdynpro with Java.

Thanks