Poloniex is an exchange that helps you buy and sell crypto currencies and using fiat is impossible so you should use an exchange to buy using your credit card and then send the funds to your poloniex wallet which I don't recommend by the way.
You probably don't have much but Its never suggested to do that , online exchange don't give you control over your private keys so If It happens and the exchange goes down (hack , ddos .. anything) , you won't be able to access your funds anymore.
You didn't mention the country you live in so I will suggest buying from virwox.com as they don't ask for ID verification's or anything but the fees are definitely high.
Hey and thanks for your reply, im in the UK so what site would anyone recommended i buy bitcoin from. I've just transferred my $17 of Bitcoin to my Poloniex account as someone else recommended i did that Si have just paid a small fee for doing so too. What would you recommend i move it too which i ca also buy bitcoin to add to it?
Regards
GriffDog
P.S ID is not an issue i have ID that i am willing to use