Unfortunately, there is no way to achieve this by only using HTML as HTML is simply a formatting tool. For something like this, your best bet is to either a)look into 3rd party utilities that you can use on your page or b)look into using asp.net or jsp to enumerate network devices.
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"The night sky over the planet Krikkit is the least interesting sight in the entire universe."
-Hitch Hiker's Guide To The Galaxy