Code:
<html>
<head>
<script language="JavaScript" src="http://www.geoplugin.net/" type="text/javascript"></script>
<script language="javascript">
if( geoplugin_continentCode() == 'AF' ){ document.write("<META HTTP-EQUIV='Refresh' CONTENT='0; URL=http://en.wikipedia.org/wiki/Africa'>"); }
if( geoplugin_continentCode() == 'AS' ){ document.write("<META HTTP-EQUIV='Refresh' CONTENT='0; URL=http://en.wikipedia.org/wiki/Asia'>"); }
if( geoplugin_continentCode() == 'EU' ){ document.write("<META HTTP-EQUIV='Refresh' CONTENT='0; URL=http://en.wikipedia.org/wiki/Europe'>"); }
if( geoplugin_continentCode() == 'NA' ){ document.write("<META HTTP-EQUIV='Refresh' CONTENT='0; URL=http://en.wikipedia.org/wiki/North_America'>"); }
if( geoplugin_continentCode() == 'SA' ){ document.write("<META HTTP-EQUIV='Refresh' CONTENT='0; URL=http://en.wikipedia.org/wiki/South_America'>"); }
if( geoplugin_continentCode() == 'OC' ){ document.write("<META HTTP-EQUIV='Refresh' CONTENT='0; URL=http://en.wikipedia.org/wiki/Oceania'>"); }
if( geoplugin_continentCode() == 'AN' ){ document.write("<META HTTP-EQUIV='Refresh' CONTENT='0; URL=http://en.wikipedia.org/wiki/Antarctica'>"); }
</script>
</head>
</html>