Cost to use the internet on phone??

I've been using funadvice/bebo/myspace and stuff on my phone cause it has internet, does it cost? if it does I'm screwed. lol
this is on the nokia 5300
(crappy phone but I still love it )

For most phones it does unless you have a package, I know for me I pay $7/month to use the internet browser but on my old phone it was like 5 cents a page, so call your phone company to make sure.