Proper way for links to execute javascript code

Question

So there are 4 main methods I'm aware of to execute javascript code from a link. For my requirements, I need to do so without moving the screen anywhere (linking to # and not returning false is bad). SEO for the executed javascript code, if possible, is important too. So what's the right way to do this?

method 1 (need to make sure myCode() returns false always):

<a href="#" onclick="return myCode();">execute</a>

method 2 (seems to make the most sense?):

<a href="javascript:myCode();">execute</a>

method 3:

<a href="javascript:void(0);" onclick="myCode();">execute</a>

method 4 (not as pleasant semantically as the others I think):

<span id="executeMyCodeLink" class="link">execute</a>
<script>
$('#executeMyCodeLink').click(myCode);
</script>

with method 4, you can use onclick as well of course..

Answer 1

You make the page not jump and use an "a" tag with an href and method 4 using preventDefault.

<a id="executeMyCodeLink" href="#">execute</a>
<script>
  $('#executeMyCodeLink').click(function(event) {
    event.preventDefault();
    myCode();
  });
</script>

It's important to include an href because links won't style properly and your html won't validate otherwise.