These are the ways to login into two or more accounts in a website at the same time (gmail, yahoo, facebook, etc.):
1. Use internet explorer 8. Go to File > New Session. A new internet window opens. You can now log in with a your another userid. To log in into other userids, just click on File > New Session and new windows should open where you can use your other ids.
2. Install Firefox. Then download CookiePie Firefox extension.
3. Use different browsers (IE, firefox, chrome, etc.)
