Arduino to imp http post /get

hello all i would like some help with code to do an http get or post to my imp from my arduino…
Anybody has done something like this? Right now i can see from my browser variables in json format.
Eventually i would like to read it with an arduino (with ethernet shield)
Please help if you have some code
Thanks again!

I think this is what you need http://arduino.cc/en/Tutorial/WebClientRepeating

Thanks @MikeyDK