WWW::Mechanize::PhantomJS, WWW::Mechanize::Firefox and WWW::Mechanize::Chrome all can take screenshots of web pages.

For all of them, you will need to know how to get to the page element using Javascript. If you don't know the DOM and Javascript, the modules will not help you much in getting the screenshots I think.

Hi, I'm not aware of any spidering technique that will provide you with a screenshot just by clicking on an image.

You can certainly get a screenshot using most solutions, you might need to scroll to the image/resource then take the screen shot. As others have said this is really a matter for whatever you use to control your browser. You may be using Perl to do this, for example I use Selenium::Remote::Driver for this with headless Firefox, eventually taking the screenshot with:

$robot->capture_screenshot('/path/to/file.png');
[download]

I think at this point it's not a Perl question anymore.

Try Javascript here.

I was trying to do it in perl as i was not able to in javascript.

PhantomJS is a headless browser, I have trouble imagining what you mean with "clicking on the graph" in combination with Perl and no browser window.

Sounds like you want a real browser with a "download on click" add-on probably combined with an automation add-on like Selenium IDE or iMacros to navigate the pages. (which is almost totally off topic here)

Cheers Rolf
_{(addicted to the Perl Programming Language and ☆☆☆☆ :)
Je suis Charlie!}

Please show us the Perl code you've tried. We can't offer much help without it.