Q93 How can I redirect a visitor to separate pages, keeping the domain name they came in with based on the referrer?

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Using JavaScript I can think of two possible solutions, one that will not work on Internet Explorer and the other that will work on all JavaScript capable browsers:

<script language="JavaScript"><!--
var who = document.referrer;

if (who.indexOf('www.domain1.com') != -1)
    window.location.href = 'http://www.domain1.com/domain1/';
if (who.indexOf('www.domain2.com') != -1)
    window.location.href = 'http://www.domain2.com/domain2/';
else
    alert('Where DID you come from?');
//--></script>

This method requires that the originating link passes a value in the search parameter, e.g.:

<a href="http://www.domain.com/index.html?1">coming from 1</a>

<a href="http://www.domain.com/index.html?2">coming from 2</a>

and then on the index.html page:

<script language="JavaScript"><!--
var who = window.location.search.substring(1);

if (who == '1')
    window.location.href = 'http://www.domain1.com/domain1/';
if (who == '2')
    window.location.href = 'http://www.domain2.com/domain2/';
else
    alert('Where DID you come from?');
//--></script>