Have fixed visible URLTag(s): HTML/CSS
Use FRAMESET with only one defined FRAME, the visible URL will always be the FRAMESET page.
<HTML> <HEAD> <TITLE>Visible URL is always the same</TITLE> <FRAMESET rows="100%,*"> <FRAME src="pagea.html"> </FRAMESET> </HEAD> </HTML>
<HTML> <HEAD> <TITLE>PAGE A</TITLE> </HEAD> <BODY> pagea <p><a href="pageb.html">pageb</a> </BODY> </HTML>
<HTML> <HEAD> <TITLE>PAGE B</TITLE> </HEAD> <BODY> pageb <p><a href="pagea.html">pagea</a> </BODY> </HTML>