jQuery Mobile scrolling Vs Sencha touch scrolling
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I had a frustrating week trying to emulate Sencha touch scrolling effect on jQuery Mobile app using iScroll4 and <https://github.com/watusi/jquery-mobile-iscrollview>

1. Why does jQuery default to native browser scrolling, whereas sencha touch takes control of the scrollbars and provides the seamless scrolling effect in touch devices? Apart from progressive enhancement I couldn't find a valid reason? Please enlighten me if there are other reasons.

2. Is there a better way to emulate what Sencha touch does for scrolling in jQuery Mobile (both vertical/horizontal)

3. I noticed that fixed headers/footers in Sencha touch is really fixed, whereas jQuery hides them when we scroll that page. What is the way to avoid these hide/show of fixed header/footers

4. What algorithms/methods does sencha touch does for scrolling if we need to built it from scrath for jQuery Mobile
