Groupby in list form

[Michael Xu (xudong)]

hi all,

I want to implement a "groupby" feature in list form. Basically, with this
feature user can group results by any field. Ofbiz has such features already
or have to customize the current list form? If have to customize, how to do
it? Is it possible to integrate ext-js or any other existing mature
javascript library for form list?

Thanks in advance for any advice.

(BTW: if list form has some more features, like export, show/hide columns,
that would be even greater.)

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Regards,
Michael Xu (xudong)