facebook invite on my site for my users

facebook invite on my site for my users

I would you to build and install a facebook plugin on our site,where users can invite their friends to our site,simular to this site.
http://fangrow.net/invitefriends.php
plugin must be well located for easy navigation,please give us your sugetions.
our site is a social exchnage site.
admefastt.com

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Requirements

Please provide us a awesome plugin and install us,with easy navigation and good looking.
many regards

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Skills Required

Php