Is there any way to take snapshot of a webpage using Javascript???

i am trying to build a script that can take snapshot of a web page with given URL.but i found no clue.is there anyway to make an application with Javascript which can take snapshot of a webpage as image.
plz show me the way.
i can take the snapshot manually.but to take 100s of pages' snapshot i should make an application.does anyone know how can it be done?any suggestion plz.

 

No, unfortunately not. For that you’ll need some sort of automated browser plug-in or controller.