Is it possible to create a print screen button for a website?
 

So someone visits your site. Clicks a button on your site and automatically saves it to your server?

Thanks for this but I barely got it.

There is a key on every keyboard labelled "Print Screen". That oughta work.

Why the fuck would you want 10s of people uploading the same screen to your server? If I visited a site with that functionality, I would just "Print Screen" all the live long day. Tap tap tap!