tools, internet options, advanced. Under browsing you will find a box to
check, Disable script debugging, and a box to uncheck "Notify for each
error" or similar words. (I'm doing this by memory).
It's tell you of an error, and unless you own the page in question and are
debugging it, it's useless to you to see the if\nformation.
Go to Tools | Internet Options | Advanced.
Check the box to Disable script debugging.
Uncheck the box to Display a notification about every script error.