title: Closing parent popup window from iframe
body: <p>On domain1.com I have a link that opens a popup to domain2.com.  Within the popup is an iframe, also hosted on domain2.com.  From within the iframe, i am trying to close the popup window.  I seem to be getting confused on how to do this.  From the iframe, do I call a javascript function defined in the popup that will close the window?  Can I close the window directly from the iframe?</p>