where to find this entry

Hi there,

i´m trying to create an effect as in your scooter sample.

on the buttons on the right side you can see a little red
border when clicked on.

I found the entry as you can see on the uploaded file i atteched.

Question?

in what document or file do i find this entry…i examined all
the html and js and css file but i can´t find that entry…

Thanks

Ger