Print the screen of your web page and send an email with a printed image

Possible duplicate:
Capturing HTML canvas as gif / jpg / png / pdf?

Is there an easy way to create a JS onclick function that will print the current screen of the website, save it as an image (.jpg or something else) and send it by email.

I would like to create this option for the user, so the user does not need to use the “Prnt Scr” keyboard, then open Paint and insert and “save as” the image, and then attach and send by email.

Thanks in advance!