You can use the HyperlinkAction action to easily navigate to a website address when the behavior is triggered.
To add a HyperlinkAction to a Windows Phone project
In the Assets panel, click Behaviors, and then drag HyperlinkAction onto the object that you want to apply the action to. The Common Properties category appears in the Properties panel.
The object to which the behavior is attached provides the context for the behavior.
In the Common Properties category, in the NavigateURI drop-down list, type or select the page that you want to navigate to.
Optionally, in the TargetWindow box, type one of the following:
_blank Opens a new window.
_parent Opens the root window.
_self Loads the URL in the current frame.
Additional TargetWindow options are available. For more information, see open Method on MSDN.
You can also type the name of the frame that you want the URL to open in.
To see a sample of this behavior, visit the Expression Community Gallery .