set value of checkbox on check

[tcovert]

How would I set the value of a checkbox in my form to 'Y' if the box is checked and 'N' if it isn't?

Any suggestions?

[fredmv]

<input type="checkbox" onclick="value = checked ? 'Y' : 'N';" />

[tcovert]

This sets the value to "on" when checked, and nothing when unchecked. How would I make the value be 'Y' if checked and 'N' if uncheched?