将网页捕获为照片并将其附加到电子邮件表单中

I've been looking on how to make this, found several topics here at stackoverlow, but is nothing similar to what I need. So, I have a web-page: http://creditbay.com/calculator/ , which contains a form with inputs. I'd like to add a button that generate a screenshot (PNG or JPG, doesn't matter) of what the user has been typed in the inputs and open a email form with this screenshot attached, so the user can only add his e-mail (or someone elses' email) and hit "Send".

Thank you all in advance.

So there's no way I can achieve what I want? I thought it will be easy to be done with html2canvas and then attach the image in a simple email form?