title: Beginning storyboard in XAML in wp7
body: <p>I have an application in windows phone 7 where I require to have images' opacity change from 0 to 1 gradually on loading the application. I thought of using storyboard but I have to begin each and every storyboard on page loaded. 
  This becomes a problem whenever I have many storyboards. How can i indicate it in the XAML itself that I need to begin the storyboard? Also How can I bind multiple items to a common storyboard?</p>