Facebook bot login

Hey guys I'm writing a facebook bot program. Currently I am stuck at
the login screen. My approach was to take a password and convert it to
md5 along with the challenge parameter that you will notice if you go
to facebook's website. To give a better idea of this I'll show you
their login form:

<form method="post" name="loginform" action="https://
login.facebook.com/login.php" onsubmit="quicklogin();"><input
type="hidden" name="challenge"
value="77950fc560a9109fe0b61bb70753cec5">
<input type="hidden" name="md5pass">
<label for="email">Email:</label>
<input type="hidden" name="noerror" value="1" />
<input class="inputtext" type="text" name="email"
value="mbinder09@choate.edu" id="email" size="20" />
<label for="pass">Password:</label>
<input class="inputtext" type="password" name="pass" id="pass"
size="20" />
<input type="submit" value="Login" name="doquicklogin"
id="doquicklogin" onclick="this.disabled=true; this.form.submit();"
class="inputsubmit"/></form>

And what I did was write a program to send the following:
challenge=3b409cf0906ebb3007e8dd1cac3343ae&md5pass=7ca980aefc6964c5a125e0c637194ca3&noerror=1&email=mbinder09%40choate.edu&pass=&doquicklogin=Login
And I am sending this data to: "https://login.facebook.com/login.php"
just like the action of the form suggests. Unfortunately this approach
does not work properly. I even cleared the password field if you note
I sent '&password=' which is required by the facebook JavaScript
method:
    function hash(form, login_url) {
        document.cookie = "test_cookie=1;domain=.facebook.com";
        if (valid_js()) {
            var challenge = form.challenge.value;
            var hash2 = MD5(form.pass.value) + challenge;
            var hash;
            if (form.pass.value) {
                hash = MD5(hash2);
            } else {
                hash = "";
            }
            form.md5pass.value = hash;
            form.pass.value = "";
        }
        return true;
    }

note: valid_js() just checks to make sure that the agent is proper
which mine is. Im worried about the document.cookie thing..could that
be it?

Any help is welcome! I am very new to web applications so don't assume
that your points will be repetitive given my lack of knowledge. Thanks!