Is there a way on a mobile web page to access the contact information on a phone?

Specifically, we have a web page that offers a newsletter signup if you enter your email address. I was wondering if there was any option to grab this information (with permission) from the device so the user doesn't have to actually type it in (kind of like how location works). I know this could likely be done from a mobile application, but can it be done from a mobile web page?