luci/applications/luci-app-radicale/luasrc/view/radicale/btn_startstop.htm

<!-- ++ BEGIN ++ Radicale ++ btn_startstop.htm ++ -->
<script type="text/javascript">//<![CDATA[

	// show XHR.poll/XHR.get response on button
	function _data2elements(x) {
		var btn = document.getElementById("cbid.radicale._system._startstop");
		if ( ! btn ) { return; }	// security check
		if (x.responseText == "0") {
			btn.value = "<%:Start%>";
			btn.className = "cbi-button cbi-button-apply";
			btn.disabled = false;
		} else {
			btn.value = "PID: " + x.responseText;
			btn.className = "cbi-button cbi-button-reset";
			btn.disabled = false;
		}
	}

	// event handler for start/stop button
	function onclick_startstop(id) {
		// do start/stop
		var btnXHR = new XHR();
		btnXHR.get('<%=luci.dispatcher.build_url("admin", "services", "radicale", "startstop")%>', null,
			function(x) { _data2elements(x); }
		);
	}

	XHR.poll(5, '<%=luci.dispatcher.build_url("admin", "services", "radicale", "status")%>', null,
		function(x, data) { _data2elements(x); }
	);

//]]></script>

<%+cbi/valueheader%>

<% if self:cfgvalue(section) ~= false then
-- We need to garantie that function cfgvalue run first to set missing parameters
%>
	<!-- style="font-size: 100%;" needed for openwrt theme to fix font size -->
	<!-- type="button" onclick="..." enable standard onclick functionalty   -->
	<input class="cbi-button cbi-input-<%=self.inputstyle or "button" %>" style="font-size: 100%;" type="button" onclick="onclick_startstop(this.id)"
	<%=
	attr("name", section) .. attr("id", cbid) .. attr("value", self.inputtitle) .. ifattr(self.disabled, "disabled")
	%> />
<% end %>

<%+cbi/valuefooter%>
<!-- ++ END ++ Radicale ++ btn_startstop.htm ++ -->