I changed Frank's good stylesheet (Bright Focus (for buttons, links, and textboxes)) into better one.

Focus only on textboxes. (NOT both on links and buttons which I think looks ugly.)

I also changed focus-color, but you can change it as you like to overwrite the line 6 in the code. (e.g. -moz-outline: 2px solid #FF1493...)

Similarly, other elements can also be highlighted such as radioboxes, checkboxes or selected elements IF you like by customizing line 11-12. (e.g. just remove "input[type="radio"]:focus" for radioboxes.)

Enjoy your more sophisticated design.