login in normal window-not popup

Is there any way to get the login link on the root page to open the login dialog in the same window instead of in a popup?

This may be really easy, but I can't seem to find an answer. I'm concerned that some of my users are using pup-up blockers, so they may be unable to log in if they don't know that the login window is being rejected.

Thanks for your time!

JC