[jQuery] Add value to Link. How can I do this?

[shapper]

Hello,

I have the following anchor:
<a href="http://www.example.com/files/map.pdf"; onClick="javascript:
pageTracker._trackPageview('/downloads/map'); ">

How can I add

    onClick="javascript: pageTracker._trackPageview('/downloads/
map');"

To all anchors of CSS class "Download" using JQuery?

Thanks,
Miguel