Originally posted by: kamper
There's a bunch of ways. The most transparent is the Location: http header. To do that you either need to be able to tell your web server to do the redirection or you need to write a page in a server side language like php or jsp.
You can also embed it into your html with a tag like the following:
<meta http-equiv="refresh" content="?;URL=
http://www.test.com/gallery"/>
where ? is the number of seconds to wait before redirection. I suppose you could substitute "Location" for "refresh" since http-equiv is meant to be interpreted as an http header. I'm just going on examples I've seen though, so I don't know how well a browser would handle that. That meta tag goes in the <head></head> section, btw.
So, if you have further questions, please specify a bit about your hosting environment (server, any languages available....)