local reg, unreg, UNREG, events = common.RegisterEventHandler, common.UnRegisterEventHandler, common.UnRegisterEvent, {}

common.RegisterEventHandler = function( func, event )

    if events[event] then

        if not events[event][func] then

            events[event][func] = func

            reg( func, event )

        end

    else

        events[event] = {}

        events[event][func] = func

        reg( func, event )

    end

end

common.UnRegisterEventHandler = function( func, event )

    if events[event] then

        if events[event][func] then

            events[event][func] = nil

            unreg( func, event )

        end

    end

end

common.UnRegisterEvent = function( event )

    if events[event] then

        UNREG( event )

        events[event] = nil

    end

end