The following code in the default document will hide the URL to where the request is being redirected:

 

‹html›
‹title›Welcome to my site‹/title›
‹frameset cols="100%,*" border=0 frameborder=0 
	border=0 framespacing=0 scrolling="no"›
‹frame src="http://123.123.123.123"
       name="AddressHidingFrame" marginwidth=0
       marginheight=0 frameborder=0 noresize scrolling="no"›
‹frame name="needed4Netscape2Work" marginwidth=0
       marginheight=0 frameborder=0 noresize›
‹/frameset›
‹/html›