Frames and background image

[hpl]

I wish to use a background image as a common background for my application which consists of 3 frames. How can I realize this?

<frameset rows="38%,54%,*" border=0>
	 <frame name="top" src="operator.asp" frameborder=0 scrolling=auto>
		 <frameset cols="50%,*">
	 		   <frame name="venstre" src="intro.htm" frameborder=0>
			   <frame name="right" src="blank.htm" frameborder=0> 
	     </frameset>
</frameset>