You're going to need to create two pieces, the first will be a server side page that takes the information and sends it via email, the second piece is the JQuery that takes the contents of the div and sends it to the server side page.
The server side will depend on your environment so it could php, asp, jsp, etc. For the JQuery part take a look at some of the ajax methods,
http://api.jquery.com/category/ajax/ , most likely the load() method,
http://api.jquery.com/jQuery.post/ , will be a good choice for you. There are plenty of samples there for you to check out.
Hope that helps
Dave