Dynamically size javascript popup based on embedded swf size

I am embedding a swf in a popup window using javascript's window.open function. I am currently passing in static values for the po开发者_开发知识库pup's height and width corresponding to the height and width of the embedded swf, like so:

window.open('http://whatever.swf', 'popup', 'width=400,height=300,resizable=1');

A user can click on a button in the swf, and it changes the size of the swf from 400x300, to 400x600. Is there a way to dynamically resize the javascript popup window to account for this size increase without reloading the embedded swf?

Any help is much appreciated....

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There is JavaScript's

window.resizeTo(x,y)

that you could call via the externalInterface from Flash.

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How about wrapping that whatever.swf in whatever.htm and put some javascript codes to resize the window, and call that from flash?