Climbing Vine on porch

Just wondering what this vine is climbing on my porch? I'm thinking a greenbrier vine maybe? Not sure. I'm in North Georgia.

Thanks!

http://i1221.photobucket.com/albums/...4/IMG_2540.jpg
http://i1221.photobucket.com/albums/...4/IMG_2541.jpg

Welcome ocraig.
The leaves remind me of Smilax sp. However, there are over 300 species so you may have to find our which ones grow in North Georgia.
I was not familiar with the name green briar vine, but I have now learnt that it is the common name for Smilax!
Have a look at this link, it shows details that you can compare to your vine. Does yours have thorns?

http://www.google.co.uk/images?q=smi...w=1241&bih=528

http://www.cas.vanderbilt.edu/bioima...ecies/smro.htm

http://en.wikipedia.org/wiki/Smilax

Thanks Silver..

Yes, it has thorns. Pretty sure it's in that family you mentioned. Greenbriar vine is just a common name in the south for those.
Thanks again.