I don't think you will have much luck with Mobile Jquery. For Nokia Asha Web Apps, almost all javascript is running on the proxy-server (the cloud),...
No watermark in LCDUI. No fancy design. Options are limited. It is what it is.
(my google web page has also no water mark in the input box, not sure...
Local preview has sometimes another advantage: The proxy server takes all your html and css apart and puts it back together in a different structure....