javascript:void(0) or onclick="return false" for <a> - which is better?

There is a javascript-based interface - so I need not to support work without javascript.

I have an

<a>Something</a>

elements with JS code, which binds on click event - so, I don't want page reload after user's click.

Which way is better?

1. <a href="javascript:void(0)">Something</a>
2. <a href="#" onclick="return false;">Something</a>

What advantages and disadvantages of each method?