You can achieve this by including this inside your <body> tags and change the '<a href="http://yoursitehere.com">http://domainname</a> with the site you want to "redirect" to:
<iframe width='100%' height='100%' scrolling='auto' marginwidth='0' marginheight='0' align='top' frameborder='0' SRC='<a href="<a href="http://yoursitehere.com">http://domainname</a>'></iframe>
