[I need some help with scripts.]

Okay, I found out it IS MySQL.

but, I need a tutorial on SQL.

[I need some help with scripts.]

I'd like to make a site similar to:

Valenth (and any similar sites)

It's basically a click-based leveling site. This is a java script that does this, correct?

I know how to create a whole web site. I'm just not sure about this element of the site. How do you make an images level change with clicks?