The following code in the default document will hide the URL to where the request is being redirected:
html titleWelcome to a wonderful site/title frameset cols="100%,*" border=0 frameborder=0 border=0 framespacing=0 scrolling="no" frame src="http://source.domain.com" name="AddressHidingFrame" marginwidth=0 marginheight=0 frameborder=0 noresize scrolling="yes" frame name="needed4Netscape2Work" marginwidth=0 marginheight=0 frameborder=0 noresize /frameset /html
原文：http://4119531.blog.51cto.com/4109531/1611774