Copy this tag between the <head></head> tags of your old web page:
<meta http-equiv="refresh" content="5; URL=http:
Note, I've put a space after the URL=http: and after the // to allow the code to display properly, so you need to remove them if you use the code.
Setting the content="5; part of the tag means that there will be a five second delay before the page redirects your visitor.
Setting the value to zero (content="0;) means there will be no delay and the redirect will begin immediately.
It's worth putting a short message on the page to the effect that things have been moved and you will be redirected momentarily. You can also put a static hyperlink on there in case your redirect script does not work for any reason.