Before anyone starts shooting me down; I'm not proposing to limit the actual width of manga-images, only to let the user decide on his own a "zoom"-level. Batoto already scales images (in the browser) when they are wider than your screen, however in some cases (like mine) when the screen is really, really wide, I don't want the image taking all the width, because that turns into too much scrolling. So I'd like the ability to say (for instance) that instead of scaling to browser-width, rather scale to the least of browser-width or 800px (random number, don't know if this is optimal, but it should preferably be editable by the user).
I can help with the logic and/or scripting if wanted, as that is my area of expertise.