am working on a social network site, that requires a few helpers ( I think thats what they are called ) however when I search google for jquery helpers, it comes up with nothing what am looking for.

basically, am looking to get something similar to this


Basically its just a few popup helpers to show a little more details both on

1. Mouse over
2. on click
3. As the 2nd url, show advise or tips on signup form options

Are these jquery or javascript or simply CSS ???

pls advise and how I can go about it

many thanks