Configuration settings can cause Internet Explorer to react incorrectly to script errors. You may get dialog boxes that display painfully granular details and ask whether to continue running scripts on the same page, handy for developers but pointless for most others. To turn off such notifications, select 'Internet Options' from the 'Tools' menu and click on the 'Advanced' tab. Make sure the box 'Disable script debugging' is checked. Find 'Display A Notification About Every script Error' and make sure it is not checked. Then click on OK.