Preventing the "Are you sure you want to leave this page?" Popup
- Start Internet Explorer.
Open Internet Explorer's Tools menu, and select Internet Options
On the Internet Options window that appears, select the Security tab
On the Internet Options window's Security tab, click the Custom level... button
In the Security Settings - Internet Zone window that appears,
in the Settings panel, scroll down to the Miscellaneous section and locate the Display Mixed content option
change the Display Mixed Content option to Enable
Click the Security Settings - Internet Zone window's OK button
Click the Internet Options window's OK button