Show URL rises Script Errors

Hello,

I added a "visit website" Hyperlink to our addin.

I use the following code to display it inside Visual Studio (2012)

var itemOps = DTE2.ItemOperations;
itemOps.Navigate(url);

This works fine, and the site shows.

Sadly there are JavaScript Errors on the page and each time the Visual Studio Script Error dialog pops up ...

How can I stop this (in Visual Studio, not on the webpage)?
Is it possible to surpress the messages for this single tab,
despite of any possible settings the developer has in his Visual Studio Settings.

best regards Stephan Hartmann ML-Software GmbH