BUtton code cl_action.lua

	elseif ( data == "button6" ) then
		KneelHU()

Function at the bottom of cl_action.lua

--kneel handsup

function loadAnimDict( dict )
    while ( not HasAnimDictLoaded( dict ) ) do
        RequestAnimDict( dict )
        Citizen.Wait( 5 )
    end
end

RegisterNetEvent( 'KneelHU' )
AddEventHandler( 'KneelHU', function()
    local player = GetPlayerPed( -1 )
	if ( DoesEntityExist( player ) and not IsEntityDead( player )) then
        loadAnimDict( "random@arrests" )
		loadAnimDict( "random@arrests@busted" )
		if ( IsEntityPlayingAnim( player, "random@arrests@busted", "idle_a", 3 ) ) then
			TaskPlayAnim( player, "random@arrests@busted", "exit", 8.0, 1.0, -1, 2, 0, 0, 0, 0 )
			Wait (3000)
            TaskPlayAnim( player, "random@arrests", "kneeling_arrest_get_up", 8.0, 1.0, -1, 128, 0, 0, 0, 0 )
        else
            TaskPlayAnim( player, "random@arrests", "idle_2_hands_up", 8.0, 1.0, -1, 2, 0, 0, 0, 0 )
			Wait (4000)
            TaskPlayAnim( player, "random@arrests", "kneeling_arrest_idle", 8.0, 1.0, -1, 2, 0, 0, 0, 0 )
			Wait (500)
			TaskPlayAnim( player, "random@arrests@busted", "enter", 8.0, 1.0, -1, 2, 0, 0, 0, 0 )
			Wait (1000)
			TaskPlayAnim( player, "random@arrests@busted", "idle_a", 8.0, 1.0, -1, 9, 0, 0, 0, 0 )
        end
    end
end )

Citizen.CreateThread(function()
	while true do
		Citizen.Wait(0)
		if IsEntityPlayingAnim(GetPlayerPed(PlayerId()), "random@arrests@busted", "idle_a", 3) then
			DisableControlAction(1, 140, true)
			DisableControlAction(1, 141, true)
			DisableControlAction(1, 142, true)
			DisableControlAction(0,21,true)
		end
	end
end)

My ui.html for this submenu

        	<div id="civ" data-parent="mainmenu" style="display: none;">
	            <button class="menuoption" data-action="button5">Hands Up</button>
	            <button class="menuoption" data-action="button6">Hands Up and Kneel</button>
			</div>