I created two simple pages;
HTML Code:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE> Test for iframe url passthrough, main page </TITLE>
</HEAD>
<BODY>
<ul>
<li><a href="frame.html#feature">Feature</a></li>
<li><a href="frame.html#index">index</a></li>
</ul>
</BODY>
</HTML>
HTML Code:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE> Test for iframe url passthrough, frame page </TITLE>
<script type="text/javascript">
var myUrl = window.location.href;
var myPos = myUrl.indexOf("#");
var src = myUrl.substring(myPos + 1, myUrl.length) + ".html";
document.getElementById( 'myiframe' ).src = src;
</script>
</HEAD>
<BODY>
<iframe id="myiframe" src="#" width="400" height="400" frameborder="yes"></iframe>
</BODY>
</HTML>