title: Iframe transparent background
body: <p>My app has a modal dialog with an iframe inside it. I've written my jQuery code such that when the dialog opens, it sets the appropriate 'src' attribute of the iframe so the content loads up.  However, during the delay between the dialog opening and the content loading, the iframe appears conspicuously as a white box.  I'd prefer the iframe have a transparent background.</p>
  
  <p>I've tried setting allowtransparency="yes" on the iframe. Any ideas? Thanks!</p>