Can dhtmlxAccordion become a little more sophisticated by having multiple levels ?
Actually dhtmlxAccordion have one level of entry. While the idea is not to reproduce the different levels of a treeview hierarchy, we could usefully have 3 of them by using backgroud color and/or indentation to make the distinction between entries.
This is useful when a treeview is not needed or wanted for building collapsible lists with a few levels.