Multi line tool tip for check boxes

Is it possible to make a Multi-line tool tip for check boxes?

I have 4 check boxes all with the same field name.

I'm looking for something like this:

S = Single

M = Married

D = Divorced

W = Widowed.

I tried this Java Script:

this.getField("PATIENT MARITAL STATUS").userName = "S = Single\nM = Married\nD = Divorced\nW = Widowed";

With no luck.