Iframe and allowtransparency

For the option allowtransparency="true" to work in an iframe, we need to set the 'style="background-color:transparent"' in the body tag.
Reference:
http://msdn.microsoft.com/en-us/library/ms537627%28VS.85%29.aspx#transparency 

http://www.dynamicdrive.com/forums/showthread.php?t=724