Admin Forum:CSS/JS span tag

Hi everyone! I'm here to ask if one can make   (or similar) tags in CSS/JS? I want to add a highlight system to Locomotive Wiki I'm an admin on, and I'm fine with the syntax for setting up the highlight, but I'm interested to know if there is a way I can get a mouse-over the userpage links to say "This user is the Founder" or "This user is an Administrator" etc. Is there a way to get the a:hover (CSS) or onmouseover (JavaScript) to display such a title? :)

PS I don't know anything about JS yet, but I'm begining to pick up CSS! so hopefully you don't have to explain the the latter quite as much (if it turns out to be CSS).

Starfleet Academy "Live long and prosper." 06:45, February 8, 2012 (UTC)