Javascript and Cookies

I was informed that web sites you log into can identify you through javascript and cookies.
I was also informed that a web site can identify you through their cookies even if you're using a different computer to log into their web site than you used before .
So my questions are:
1. How does javascript identify you?
2. How can a web site identify you through their cookies if you're using a different computer to log into their web site than you used in the past?
NeedAnAnswer123Asked:
Who is Participating?
 
Dave BaldwinConnect With a Mentor Fixer of ProblemsCommented:
1. Javascript by itself can not identify you.

2. A web site can not identify you if you have never used that computer before.  If you used it to log on last year, the cookie from that time may still be on the computer.  I have over a dozen computers here and if I have never used one of them to log on to Experts-Exchange, I have to enter my username and password again to gain access when I am on one I haven't used before.

If you are connecting in all cases from the same LAN and thru the same gateway, your public IP address will be the same.  The web server may be tracking that.

0. You should probably find someone else to ask about these things because someone is giving you inaccurate info.
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NeedAnAnswer123Author Commented:
Mr. Baldwin
Thanks for your answer.  Yes, I thought the information was inaccurate.
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Dave BaldwinFixer of ProblemsCommented:
You're welcome, thanks for the points.
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