Automatic Website Login Scripts

I have the requirement for a script which can login to online bookmaker websites with the usernames and passwords provided on a webpage html table.

The table currently has the following columns:
Bookmaker, Username, Password

Another column needs to be added which will contain a button which will open up the bookmaker website in a new tab and login using the corresponding details in that table row.

In total there is a list of about 25 bookmakers which require a script for automatic login. The following is a an example of 3 online bookmakers:

http://www.betfred.com/
http://www.coral.co.uk/splash
http://www.bet365.com/

-The complete list can be provided on request.
-The html code for the table can be provided on request.
-Coding language used is not important.

-Further work will be available for new bookmakers/maintenance for old bookmakers who have had change their websites.

Thanks,
Peter