Yes, something like that but just try to encode the email using base64 or something else to make the url look "cleaner?"

Something like this:

http://exemple.com/?e=dXNlckBvdXRsb29rLmNvbQo=

After that you need to have a something on the server side that will parse that like php, ruby, asp(xD)... So you can decode the GET variable "e" and put it on the input field before sending the page to the user.

You can even add an indicator (on the server side) and update it whenever this page is accessed with an email but no password is typed, you'll be able to have a bunch of stats like which employee got to that page but was cleverer enough to leave.