Authenticating users when they input the url into their browser
<p>Try the following URL: <a href="https://cms1.gre.ac.uk/collaborativeprogrammes/student/index.asp" rel="nofollow">https://cms1.gre.ac.uk/collaborativeprogrammes/student/index.asp</a></p>

<p>It brings up an authentication prompt with username and password which is separate from the accounts on their site; groups of users have the same username and password to gain entry, however once inside, you log in with you own username and password.</p>

<p>How could I implement this? i.e. the first authentication prompt only.</p>
