[javascript] Change span text?

Possible Duplicate:
How do I change the text of a span element in javascript

Well, I've searched a lot for the answer to this, but still I couldn't find it. What I did find didn't work.

What I'm trying to do is, basically, using JavaScript: At the browser's bar, not via Greasemonkey or something else, edit a span's text .

This' the span that contains the text I want to edit:

<span id="serverTime">5:46:40</span>

The time within is just random, don't pay attention to it, it's what I want to edit using javascript..

I'm a newbie so yeah :\

Replace whatever is in the address bar with this:

javascript:document.getElementById('serverTime').innerHTML='[text here]';

Example.