Google Maps how to add a polyline to this?

JavaScript
1

I have added a Google Map to my website using this approach, it works perfectly for my needs BUT… I would really like to add a poly line. Can anyone please show me how to add such a line to the following sample.

<!--From http://you.arenot.me/2010/06/29/google-maps-api-v3-0-multiple-markers-multiple-infowindows/-->
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <title>Google Maps Example</title>
    <style type="text/css">
      html { height: 100% }
      body { height: 100%; margin: 0; padding: 0 }
      #map_canvas { height: 100% }	
	</style>
     <script src='http://code.jquery.com/jquery.min.js' type='text/javascript'></script>
</head>
<body>
<script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=false"></script>
<script type="text/javascript">
var infowindow = null;
    $(document).ready(function () { initialize();  });

    function initialize() {

        var centerMap = new google.maps.LatLng(39.828175, -98.5795);

        var myOptions = {
            zoom: 6,
            center: centerMap,
            mapTypeId: google.maps.MapTypeId.ROADMAP
        }

        var map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);

        setMarkers(map, sites);
	    infowindow = new google.maps.InfoWindow({
                content: "loading..."
            });
		
        var bikeLayer = new google.maps.BicyclingLayer();
		bikeLayer.setMap(map);
    }

    var sites = [
	['Mount Evans', 39.58108, -105.63535, 4, 'This is Mount Evans.'],
	['Irving Homestead', 40.315939, -105.440630, 2, 'This is the Irving Homestead.'],
	['Badlands National Park', 43.785890, -101.90175, 1, 'This is Badlands National Park'],
	['Flatirons in the Spring', 39.99948, -105.28370, 3, 'These are the Flatirons in the spring.']
];



    function setMarkers(map, markers) {

        for (var i = 0; i < markers.length; i++) {
            var sites = markers[i];
            var siteLatLng = new google.maps.LatLng(sites[1], sites[2]);
            var marker = new google.maps.Marker({
                position: siteLatLng,
                map: map,
                title: sites[0],
                zIndex: sites[3],
                html: sites[4]
            });

            var contentString = "Some content";

            google.maps.event.addListener(marker, "click", function () {
                // alert(this.html);
                infowindow.setContent(this.html);
                infowindow.open(map, this);
            });
        }
    }
</script>

<div id="map_canvas" style="width:100%; height:100%"></div>
</body>
</html>