"Step 1: Taking a screensnap of your chart:
Step 2: Cropping an Image using Paint.
Step 3. Saving your cropped image to your clipboard."

For those using Firefox, there is an excellent free extension called Fireshot, which I find is fast and easy to use for grabbing a piece of a web page, and manipulating it.

The extension is available here .

I believe the author also has an Internet Explorer flavor, but I have only used the Firefox flavour.