luci/modules/admin-full/luasrc/view/admin_network/switch_status.htm

<script type="text/javascript">//<![CDATA[
	var tb;
	var ths = document.getElementsByTagName('th');
	for (var i = 0; i < ths.length; i++)
		if (ths[i].className = 'cbi-section-table-cell' && !ths[i].innerHTML)
		{
			ths[i].innerHTML = '<%:Port status:%>';
			tb = ths[i].parentNode;
			break;
		}

	if (tb)
	{
		XHR.poll(5, '<%=luci.dispatcher.build_url("admin", "network", "switch_status", self.switch)%>', null,
			function(x, st)
			{
				if (st && st.length)
				{
					for (var i = 0; i < st.length; i++)
					{
						var th = tb.childNodes[i+1];

						if (st[i].link)
						{
							th.innerHTML = String.format(
								'<small><img src="<%=resource%>/icons/port_up.png" />' +
								'<br />%d<%:baseT%><br />%s</small>',
								st[i].speed, st[i].duplex
									? '<%:full-duplex%>' : '<%:half-duplex%>'
							);
						}
						else
						{
							th.innerHTML = String.format(
								'<small><img src="<%=resource%>/icons/port_down.png" />' +
								'<br /><%:no link%></small>'
							);
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					}
				}
			}
		);
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//]]></script>