Hi,
thank for posting!
A Windows Store app using JavaScript contains at least one HTML page. That page, and any other pages you include in the app itself, generally run in the app's local context. When you use an
iframe to navigate to a remote page, that page runs in the web context and has limited access to your system.
You can use the ApplicationContentUriRules section of the app's package manifest to give a page in the web context access to your system's geolocation devices (if your app has permission to access this functionality), as well as access to
the clipboard.
You can see this link:
http://msdn.microsoft.com/en-us/library/windows/apps/hh465373.aspx
http://msdn.microsoft.com/en-us/library/windows/apps/br211416.aspx
Cross Domain:
http://msdn.microsoft.com/en-us/library/windows/apps/br229787.aspx
Hope this helps!