Pls help..Need to disable Javascript error in Web browser control

Hi,

I am using a web browser control in my Win Form when i try to open the application from XP running machine it is working fine without any errors.When I try to open the same application from Windows 7 OS running machine,  inside the web browser I am getting some Java script errors while loading the form.

JavaScript errors are: (Internet Explorer script error)

1. Invalid character in URL

2. ASP.NET Ajax client side framework failed

3. "Sys" is undefined.

Is this error is because of the coding or any configuration is missing or IE issue?? Please help