Visual Basic 2010 Express: Script error on web browser

Hello to all the experts here! I've completed a web browser using Visual Basic 2010 Express, and I've encountered a major problem. Whenever I tick a checkbox on a website, the following error message pops up:
An error has occurred in the script on this page.
Line: 193
Char: 9
Code: 0
Do you want to continue running scripts on this page?
[Yes] [No]
If I click on either 'Yes' or 'No', the error message pops up again, and I need to run the Task Manager in order to close the web browser. I’m thinking that there's possibly an extra code that I must set in for JavaScript, but I'm totally unable to solve this.
Any help that I can get will be greatly appreciated. Thanks a lot in advance!
