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I may seem ignorant but I have not found much information about how to go about my problem developing my BlackBerry application. Basically I have constructed a UI that contains a few image buttons. What I want to do is when I click on one of the buttons, I want an image at the center of the screen to switch seemlessly to another image. I am currently not using any threads though from what I've gathered I need to? Or do I simply have to push a new screen in my button listener and recall the class's constructor and rebuild the page with different images? Sorry if this is unclear, I would really appreciate some basic info on how to do this or a link that explains page refreshing in detail for blackberry! Thanks alot EDIT : Okay here is a very small part of my code : This is basically the last thing I have tried in the listeners, I dont know how to change the image (flagField) when I press one of the two buttons! The only thing that worked for me was pushScreen(new

Do i need to pay a developer's fee of 99$ per annum if i want to list my web app on the apple web app store, or any other place for that matter (android etc.)? Can i ask user to come and pay for new features on my site through this web app? will I be breaching some archaic policy by doing that? This web app is complete on its own but user might want to have extra features which come at a price of course! Which merchant is the best for my basic needs. paypal comes to mind but is it my only option? this is my hobby. I have a separate day time job which does not involve software development. what do i need to do as far as paying taxes (if any) is concerned. am i liable to pay taxes? I do not want to create my own company etc. just because im developing this web app. By the way, if you intend to reply on tax-related questions, please understand I reside in England.