Internet Explorer Script Error when Opening Multiple IE Windows

I opened multiple IE windows and with different sites, I got this Script Error message.
How can I avoid this?
It closes the browser when I click no, but if I click yes it will take forever to load and then I am forced to close it.

Internet Explorer Script Error
An error has occurred in the script on the page.
Line: 75
Char: 2
Error: 'goPPCSell" is undefined
Code: 0
URL: file://C:/Program files/EarthLinkISPISP8000HTAmain.brt
Do you want to continue running scripts on this page?
Yes No
