To turn off your pop-up blocker

Yahoo Popup Blocker:

http://help.yahoo.com/l/us/yahoo/toolbar/features/popupblocker/basic/pub-13.html

AT&T Pop-up Blocker:

http://help.yahoo.com/us/sbc/tutorials/popup/ct_popup1.html

Windows Explorer Popup Blocker:

http://www.microsoft.com/windowsxp/using/web/sp2_popupblocker.mspx