- different browsers differ greatly in expected Jscript objects. This means that most likely, you will never have a fully cross-Jscript-capable interface. While EczemaScript has been a worthy attempt in perhaps the right direction, but even the world's most popular browser is skimpy on compatibility.
If you find that you your web application would be better represented using objects or states, then look into jellybean or CGI::Application, not to mention everything2 and a slur of proprietary web object servers.
If you're looking for TRUE interactivity, you're not looking for web-based apps. In that case, you'd be looking at actual GUI implementations which your customer may benefit from. Try Tk for a cross-platform solution. Web searches on any of these topics will get you off to a strong start. Good luck!
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