Help with robots.txt and dynamic URLs

[smoked1]

I need to block some dynamic URLs from being indexed in the search engines. The URLs that I need to block look like this:

/index.php?target=auth&mode=login_form&redirect_url=index.php%3Ftarget%3Dorders&csid=725cd92235b4438ce1a8a475d52ccc97&sl=EN&currency=usd

Can I use an entry like this to block it?

Disallow: /index.php?target=auth&mode=login_form

I don't want to screw up and get my whole site blocked.

[smoked1]

Can anyone shed some light on this for me?

[manish.chauhan]

Disallow: /index.php?target=auth&mode=login_form&redirect_url=*
IMO this shoul help you..:)

[smoked1]

Wow, you sure do know stuff. Thank you for your help.