$_POST data in pop-up window

Hi all!
I have a page (generated with PHP) that has a list of employee names. What I want to do is, when the user hits on each name, a pop-up window (using Javascript) to appear which will say some more details on the employee (i.e his age, job experience etc).
So I thought I make a form for each employee name, and use hidden fields to pass the info I want.
For example

<form>
<input type="hidden" name ="age" value="23 years old">
<input type="hidden" name="experience" value="expert">
<input type="submit" value="John">
</form>

With the above, I show a little example of course. What I have is a submit button with John's name written in it and I want, when the user clicks on John, a pop-up window to appear and contain the "hidden" values of age and experience in it.
I don't know much about Javascript, i tried usind the document.write function, but no luck. I can only "send" data to the next page that are written in an input field, but not data that are written in hidden fields...
Any thoughts?