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What anonymity levels of HTTP proxy servers exist?
1. Transparent - these proxies are not anonymous. They don't hide IP-address of a client and let a web server know that you are surfing through a proxy server. The task of such proxies, as a rule, is information caching and/or support of Internet access for several computers via single connection. Such proxies are not applicable for security and privacy while surfing on net. You can use them only for network speed improvement.
2. Anonymous - these proxies don't show your real IP but change the request fields so it is very easy to detect that you are using proxy.
3. High Anonymous - these proxy servers do not pass an IP-address of a client and don't send any variables indicating that you are using proxy server to host and look like real browser.

http://www.checkproxy.net

Thanks for your information.
Sorry for seperating your post from the original thread. Maybe you're trying to providing a solution, but the original thread are discussing the Javascript withing HTML files on the local disk. It's wholly irrelevant.
Besides, the knowledge of proxy characteristic and proxy searching web site could be useful for other readers.

不管你相不相信，這個 feet 其實是個俄國來的 spam bot...

看不懂中文還能註冊？嗯～～大概是猜 phpBB 的欄位吧？所有 phpBB 註冊欄位順序都差不多。

至於 IP 是哪來的，有網站可查。