[jQuery] Disable dropdown when checkbox checked?

[Toaster]

Hey

I was wondering on how I might be able to have a checkbox that when
checked or unchecked would disable or enable a dropdown.

I am still very new to jQuery but this is what I have but doesnt work.

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                function stillWork(id) {
                        if ($(id).is(':checked'))
                        {
                        $("#work_month_end_1").attr("disabled", true);
                        $("#work_year_end_1").attr("disabled", true);
                        }
                        if ($(id).not(':checked'))
                        {
                        $("#work_month_end_1").removeAttr("disabled");
                        $("#work_year_end_1").removeAttr("disabled");
                        }
                }
----------------------------------------------------------------------------

I also experimented with a couple other ways and it usually gives me a
problem where it automatically unchecks a box after checking it/
running the js.

Thanks in advance