3. Well, CasperJS solves this kind of problem using a convenient API
for dealing with asynchronous stuff:
l
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API docummentation

5. What is PhantomJS?
PhantomJS is a headless WebKit with a JavaScript API. It has fast and native support
for various web standards: DOM handling, CSS selectors, JSON, Canvas and SVG.

6. Capturing screenshots
Capturing a screenshot of a given area is as easy as this:
l

8. Filling and handling forms
Filling and submitting a form is not much harder:
l

12. Implementation for digaku2
For all page
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13. Output :

16. Inference
Using casperjs more easy & powerfull than javascript, because casperjs directly call
API of the library
API docummentation
Installation

17. Thank you... :D