How to add comment box below image when it is poped up by light box

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C#2.0

C#

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Facebook-API

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This is quite interesting and difficult for me but i want to create an image gallery in which i can add comment for images. For example i have an datalist in which i get my images from database now when i click one of the images it pop up using light box , i have done that part that quite simple you just have to add some javascript for it now what i want is to show comment box below the popup image just like the following link

http://www.premierlife.ca/gallery/cabin-fever-wednesdays-jbrs-11-02-11/

in this link when u click one of the images it will popup and a comment box will appear its an facebook comment i want same like that how can i do that.. or is their is another way of doing this i mean not with light box

Thanks in advance