IE7 has very strict security control over pop up. When you visit a web page that uses pop up, IE7 will show “Pop-up blocked. To see this pop-up or additional options click here…” in the information bar above the page and below the browser URL box. When you click on the warning message in the IE7 Information Bar, you can choose the option of Temporarily Allow Pop-ups (noted that there is no Always Allows Pop-up from This Site option). However, pop-up will still be blocked even after you choose to allow pop-up from this site.
What is more annoying is that IE7 will block all pop up regardless of your
Pop-up Blocker settings, even if you include the URL link location in the
“Address of website to allow” section, or even after you disable and completely
turn off the IE 7 Pop-up Blocker in order to allow all pop-ups.
For web authors, there are scripting solutions to get around the problem, such
as the one provided by
http://www.hunlock.com/blogs/Working_around_IE7s_prompt_bug,_er_feature
For web users, we can add selected sites into the Trusted Sites zone in Internet Explorer 7. To do this:
The selected website will now no longer be blocked any elements, be it normal webpage pop-ups or dialog boxes. You may need to restart the browser for the new setting to take effect.