Q558 How can I avoid people bookmarking pages and returning later without logging onto my site?

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Q558 How can I avoid people bookmarking pages and returning later without logging onto my site?

Use frames!

In the page that you don't want bookmarked use:

<html>
<head>
<script language="JavaScript"><!--
if (parent.location.href == self.location.href)
     window.location.href = 'index.htm';
//--></script>
</head>

<body>
...

And then in index.htm (i.e. your default logon screen):

<html>
<frameset cols="100%,*">
<frame src="logon.htm" name="main">
<frame src="blank.htm">
</frameset>
</html>

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