DHtml Tree Grid: I was just evaluating this library on net

How exactly Smart XML Parsing works
All xml loaded at once, but parsed and rendered only when item of treeGrid become visible or called by API

>>or it makes call every time
The treeGrid also supports dynamical loading, so content of branches can be loaded by such additional requests ( in theory it is possible to use both modes in same time )

>>In pagination support
Pagination  available only for plain grids.
Paging can work in two modes - static and dynamic, in static mode all data loaded at once, in dynamic mode - data can be fetched by ajax on demand.