How to disable text selection highlighting

For anchors that act like buttons (for example, the buttons on the sidebar of this Stack Overflow page titled , , and ) or tabs, is there a CSS standard way to disable the highlighting effect if the user accidentally selects the text? I realize that this could be done with JavaScript and a little googling yielded the Mozilla-only -moz-user-select option. Is there a standard-compliant way to accomplish this with CSS, and if not, what is the "best practice" approach?