Creating a program to automatically login to a website

A website has an offer I'd like to capitilize on. Its on a first come first serve basis. All I have to do is log-on to the site and hit the submit button. I'd like to write a program that would continually send the login info and the submit button over and over. Its and .asp webpage.

The login looks like this:
<TABLE BORDER=0 class=tableStyle>
<TR class=normalFont>
<TD>Username: </TD>
<TD><INPUT TYPE="text" NAME="p_username" SIZE=20 MAXLENGTH=20 ></TD>
</TR>
<TR class=normalFont>
<TD>Password: </TD>
<TD><INPUT TYPE="password" NAME="p_pass1" ></TD>
</TR>
<TR >
<TD><BR></TD>
<TD><BR></TD>
</TR>
<TR >
<TD><TD align="left"><INPUT TYPE="submit" VALUE="Submit Login" ></TD>
</TR>
</TABLE>

The submit button looks like this:

<INPUT TYPE="submit" name="SubmitApplication" VALUE="Submit Complete Application" disabled>

I'd like the program to loop over and over again. Any ideas on how to do this?

What language do want to do this in? If you want to use ASP research Microsoft.XMLHTTP. This can "scrape" a page by POSTing the username and password for you