Frame rendering a Web Page - turn off javascript

If your version of .NET for this application supports it, have you tried using the WebBrowser control?

http://msdn.microsoft.com/en-us/library/system.windows.controls.webbrowser.aspx

Update: I found a blog post that has a fix for this, although it doesn't do exactly what you wanted. It uses javascript script injection to disable javascript errors. I have not tested this.

http://www.codewrecks.com/blog/index.php/2010/08/31/disable-javascript-error-in-wpf-webbrowser-control/