Place inside <head> to refresh page after 5 seconds:
Code: 
 <meta http-equiv="refresh" content="5">
Redirect to http://example.com/ after 5 seconds:
Code: 
 <meta http-equiv="refresh" content="5;url=http://example.com/">
Redirect to http://example.com/ immediately:
Code: 
 <meta http-equiv="refresh" content="0;url=http://example.com/">


Source: http://en.wikipedia.org/wiki/Meta_refresh