Can I have an onclick effect in CSS?

Question

I have an image element that I want to change on click.

This works:

#btnLeft:hover {
    width:7         


        

Answer 1

Edit: Answered before OP clarified what he wanted. The following is for an onclick similar to javascripts onclick, not the :active pseudo class.

This can only be achieved with either Javascript or the Checkbox Hack

The checkbox hack essentially gets you to click on a label, that "checks" a checkbox, allowing you to style the label as you wish.

The demo