You can keep most browser's from caching a page by using the meta tag:
<meta http-equiv="pragma" content="no-cache">
(Inserted anywhere between the <head> and </head> tags).
Of course this means that every single time a user goes back to that
page their browser (most browsers) will be forced to completely re-
download everything on that page again -- even if you haven't made
If, on the other hand, you're looking for some way to broadcast content
immediately, you're talking about something entirely different. The
World Wide Web is based on a "pull" technology where the user must
request a Web page before it is sent. If you want to send data to a user
without them requesting it you have to use something called "push".
The PointCast site
contains news, technical support information and a
download link for the PointCast Network, a client program that delivers
customized news to your desktop.
The Push Channel Resources site
offers a complete directory of push
channel resources including news, documents, articles, tools, and
The Web Broadcasting links page
contains a comprehensive listing of Web
broadcasting related links, from push technology to streaming media
providers and many related articles.
is about using the
"webcasting" features of IE 4 and Communicator to deliver push content.
is a free Windows application that pushes customized news
to the desktop in a ticker-style display.
discusses push publishing in the areas of e-mail and
corporate intranets and through applications such as PointCast.
CNET's Top tips for push programming
lists several tips for Internet
Explorer, Netscape Netcaster, PointCast, Castanet Tuner, and BackWeb.
ZDNet's PushUser Guide
is a collection of articles about push