title: How to fade background when panel is visible in asp.net
body: <p>I am working on a project and in that I want to apply background fade feature when a panel opens on a webpage in asp.net. The fade in feature looks like the Facebook photo feature.<a href="http://screencast.com/t/KYKr22Q96B9P" rel="nofollow">click here to see Facebook photo effect</a><br>
  Here consider the photo as my panel and background as my web page.</p>
  
  <p>Please help me with this as I don't know what this effect is called.</p>