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Five seconds into reading the code, I saw one of the errors (didn't read the whole thing)

You opened the script tag like this <script>. Try using <script type="text/JavaScript">
You need to tell...

You cannot get local (internal) ip address. Networks are almost ALWAYS configured to hide internal ip, and thus you can only get the external (the one set by ISP) ip. Don't know the code to do this...