Creating Usable Javascript Links

As I surf the Web, I come across countless Web sites that use one of the following methods to invoke a javascript function when someone clicks a link:

<a href="javascript:somefunction()">Click to invoke somefunction</a>

or

<a href="#" onclick="somefunction()">Click to invoke somefunction</a>

Unfortunately, these types of links are completely unusable for anyone with javascript disabled (and, for that matter, the second example is completely useless to people that can’t “click” the links, such as people using older handheld devices). Even worse, the second example can be extremely annoying, as it focuses the screen back to the top of the Web page when you click it.