REAPER script: toggles FX floating windows of all VSTis on selected tracks

Toggle show instrument FX on selected tracks.lua

-- Version 1.0
--
-- This script toggles visibility of all instrument FX on the selected tracks.
-- It requires that the FX be prefixed with "VSTi:" (which Reaper does do by
-- default).
--
-- Released to the public domain.

for idx = 0, reaper.CountSelectedTracks(0) - 1 do
    track = reaper.GetSelectedTrack(0, idx)
    for fx = 0, reaper.TrackFX_GetCount(track) - 1 do
        r, name = reaper.TrackFX_GetFXName(track, fx, "")
        if string.sub(name, 0, 5) == "VSTi:" then
            if reaper.TrackFX_GetFloatingWindow(track, fx) == nil then
                reaper.TrackFX_Show(track, fx, 3)
            else
                reaper.TrackFX_Show(track, fx, 2)
            end
        end
    end       
end