Yes there is - if your'e referring to an swf that you wish to fill the browser window ??
within your html editor find the swf file's dimensions - it will look like this :
27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=5,0,0,0" width="400" height="350">
Where the code says 400 x 350 , change these to 100%
This will resize your document to 100% of your browser window.
If you have dreamweaver you can simply do this in the properties dialogue box.
Give this a try 1st to see if it helps