You should be able to link directly to a graphic. You would define your link as http://www.yourURL.com/graphicname.png

But at this point it is only a graphic, not a "web page". You likely won't be able to link from this graphic to another page (I haven't used Fireworks a great deal, so don't know how it manipulates files).

It would be best to build your page with HTML and then include your graphics. Or, if you just don't want to take the time to learn how to do that you could always build in Word and save it as HTML, although who knows what you will end up with.

Hope this helps.