Show the uptime/downtime for a certain time period in a map

Not a question, just wanted to share how I'm getting the uptime/downtime or sensors for a certain time period in maps. For example, I was tasked with generating a dashboard that had certain sensor's uptime/downtime for the last month. By default the <#objectstatus name="uptime" id="<@objectid>"> provides the uptime for the life of the sensor, but I want to provide my own start and end date (like using a report) but in a map. Using the 'historicdata_totals.xml' api and writing a custom map object, this was possible...

<!--Custom Map Objects: Sensor Stats Up/Downtime Last Month-->

<div class="map_object" id="<@itemid>" objectid="<@objectid>" subid="<@subid>" style="<#mapobject type="topleftcoordinates" subid="<@subid>" mode="<@editmode>">">
	<#checkobjecttype objecttype="sensor" nicemessage="true" id="<@objectid>">
	<#mapobject type="objectgrip" mode="<@editmode>">
	<#mapobject type="htmlbefore" subid="<@subid>">
	<font face="arial;" size="2"><b><#objectstatus name="name" id="<@objectid>"></b></font>
	<#objectstatus name="downsens" id="<@objectid>">
	<font color="green"><b><div id="<@objectid>uptime"></div></font>
	<font color="red"><b><div id="<@objectid>downtime"></div></font>
	<#mapobject type="htmlafter" subid="<@subid>">
</div>

<SCRIPT LANGUAGE="JavaScript">
// set start date to 1 month before current date
var startDate = new Date();
startDate.setMonth(startDate.getMonth()-1); 
// date format required for historicdata_totals.xml = 2017-02-12 (yyyy-mm-dd)
var d = new Date(startDate),
month = '' + (d.getMonth() + 1),
day = '' + d.getDate(),
year = d.getFullYear();
if (month.length < 2) month = '0' + month;
if (day.length < 2) day = '0' + day;
startDate = [year, month, day].join('-');

// set end date to today
var endDate = new Date();
// date format required for historicdata_totals.xml = 2017-02-12 (yyyy-mm-dd)
var d = new Date(endDate),
month = '' + (d.getMonth() + 1),
day = '' + d.getDate(),
year = d.getFullYear();
if (month.length < 2) month = '0' + month;
if (day.length < 2) day = '0' + day;
endDate = [year, month, day].join('-');

//console.log(startDate);
//console.log(endDate);

var xhr = new XMLHttpRequest();
// false makes the request synchronous, doesn't work async when used multiple times in a single map
xhr.open('GET', 'https://YOURPRTGSERVER/api/historicdata_totals.xml?id=<@objectid>&sdate='+startDate+'-00-00-00&edate='+endDate+'-23-59-59', false);

xhr.onload = function () {
	if (xhr.readyState === xhr.DONE) {
		if (xhr.status === 200) {
			console.log(xhr.responseText);
			parser = new DOMParser();
			xmlDoc = parser.parseFromString(xhr.responseText,"text/xml");

			var UptimePercent = xmlDoc.getElementsByTagName("uptimepercent")[0].childNodes[1].nodeValue;
			var Uptime = xmlDoc.getElementsByTagName("uptime")[0].childNodes[1].nodeValue;
			document.getElementById("<@objectid>uptime").innerHTML = "<b>Uptime:</b> " + UptimePercent;
			
			var DowntimePercent = xmlDoc.getElementsByTagName("downtimepercent")[0].childNodes[1].nodeValue;
			var Downtime = xmlDoc.getElementsByTagName("downtime")[0].childNodes[1].nodeValue;
			document.getElementById("<@objectid>downtime").innerHTML = "<b>Downtime:</b> " + DowntimePercent + " ["+Downtime+"]";
		}
	}
};
xhr.send(null);
</SCRIPT>

This may not be the most elegant, or best way to accomplish this; and I'd be glad to hear what may be a better solution, but for the time being this is working great. Hopefully someone might find it handy.