Basic mouse over text box in HTML?

[Kaiju]

Basically i want a function on my website where a mouse over certain text will produce a small text box with further writing, like a speech bubble effect.

Any ideas as to how i can do this in HTML alone, or is this javascript based?

 

[Mr_L]

You can do it with JavaScript.

A list of JavaScript Tool Tips

 

[Kaiju]

Perfect, thanks!