same session ID being generated across diff IE windows

Hi, I have observed on IE 8 windows 7 machine, whenever I open my application on separate IE windows, the same session ID gets generated for each of them.

I was expecting different session ID's for different windows.

Does anyone knows why this is happening.

Code used to generate session ID

Code:

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HttpSession session = request.getSession();

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The same machine.
The session id is stored in a cookie (unless you're doing URL rewriting).
That same cookie is read by each IE window you open.

thanks Toll. I got additional info from this link IE 8 Release version is sharing session cookies across browsers - Page 3 - Microsoft Windows Vista Community Forums - Vistaheads