Please suggest the better approach plugin for dropdown having following requirements

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Javascript

jQuery

We have a dyna-tree in our application with checkbox option with 2 levels.

Now we have to remove the tree and need to show buttons. (main level1 node within tree)

On each of button click the options should open as dropdown popup with

checkbox list
Autocomplete search box
Select all/Reset (if none selected then select all)
Count number of selected option
Next time open dropdown with selected option on top
Show/Hide inactive option

Please suggest, Is there any ready-made plugin which can handle this type of functionality?


Thanks

What I have tried:

I tried to with the manual template structure in jquery but looking if there is any jquery plugin that can already use this.