keyboard selection of radio button
I was wondering if it's possible to use the keyboard (aside from using the arrow keys) to select a radio button. For example, on a form, I have a field whose values come from a value list. I would like the user to be able to tab into the field and make a radio button selection using the keyboard by pressing the first letter of the desired selection. I'm not sure if this is relevant, but one more wrinkle is that these particular fields are not storing the actual value of the radio buttons, but rather a corresponding numeric value from another field in the value list table.
I was surprised not to find any information on this already in the forum, but I may have missed it. Is what I'm proposing possible?
Any help is greatly appreciated