check whether session is active or not.

Hi all,

1) I am havig some problem with session Id.I am having all the session id of all users who have logged in.I want to check

using session id whether that session is alive or not.

eg sessid.isalive() something like.

2) Can U tell me how to encrypt the URL from the client when a request comes

eg /servlet/firstservlet/?name="dais"&value="pawd"

I dont want the user to see this infn .How to do it.

3) Is there any way to clear the cache from any browser.

Thanks in advance

Daison

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