how do use numlock on a laptop?

[Hopeless]

im using a laptop and i don't know ho to use the num lock :(

Its on my scroll button, but i think i have to select the second function of the button to click the num lock

any ideas?
+reping

[Swearwolf]

da second function button is usually "Fn" by the control/alt keys and is in blue text usually if dat elps

[Shinigami]

Yeah, on mine theres a Fn key. It should look something like http://www-307.ibm.com/pc/support/site.wss/x40fnkey.gif but mine has a square around the letters