Re-committing r42528:

Re-committing r42528:
*Add "return false" to the onclick handler, which fixes the reason it was reverted (link causes Firefox to scroll to the top of the page) for JS-enabled browsers
*Hide both arrows for JS-disabled so the link (which does nothing without JS) isn't there to mess up scrolling or break horribly with paranoid browser extensions
*Tested for compatibility in Firefox 3.0.3, IE7, Safari 3.1.2, and Opera 9.52.