WebSphere instalation

what are the prerequisites for installing websphere.
and how i can install it on windows platform.

Here are the prerequisites for WebSphere Application Server.
http://www-3.ibm.com/software/webservers/appserv/doc/latest/prereq.html
The Library link on that page will take you to a page listing lots of documentation. The combined online InfoCenter puts a lot at your fingertips. The WebSphere Domain at www.redbooks.ibm.com provides access to some good free books, as well.
Installing on Windows can be as simple as running setup (as I recall) from the install media, once you know what you want to install, and that you have a suitable environment.
There are other "WebSphere" products besides the application server, e.g., Studio and Portal, to name a few, but the mostly build on are are closely related to the Application Server.

I have installed websphere but it's admin console is not running when i click Start Admin Server...now what to do...
Is it neccessary to have any web server(like tomcat)priopr to install websphere?
plzhelp ...i am in hurry.
oopppsss! my server is not running...

I have installed IIS and webshere on my machine.But as i try to start websphere by clicking Administrator's console the onnection can not esstablish and i get a message "Admin client fail to connect to Admin server. start local or remote admin server service to launch admin client"
plz help..
[ October 19, 2003: Message edited by: Anjili Akash ]
[ October 20, 2003: Message edited by: Anjili Akash ]

U need to start the admin server before you attempt to start the admin console. This can be done be running the startupServer.sh ( or .bat) file.