Google maps, 3 maps on same page

    <script type="text/javascript" src="https://maps.google.com/maps/api/js?sensor=false"></script>
     
    <div id="map_canvas" style="width: 580px; height: 400px"></div>
     
    <script type="text/javascript">
    //<![CDATA[
    var map = null;
    function initialize() {
      var myOptions = {
        zoom: 13,
        center: new google.maps.LatLng(36.51308543049258, -4.886341094970703),
        mapTypeControl: true,
        mapTypeControlOptions: {style: google.maps.MapTypeControlStyle.DROPDOWN_MENU},
        navigationControl: true,
        mapTypeId: google.maps.MapTypeId.ROADMAP
      }
      map = new google.maps.Map(document.getElementById("map_canvas"),
                                    myOptions);
     
      google.maps.event.addListener(map, 'click', function() {
            infowindow.close();
            });
     
      // Add markers to the map
      // Set up three markers with info windows
     
           
          var point = new google.maps.LatLng(36.50856685143835, -4.866085052490234);
          var marker = createMarker(point,'<div style="width:240px">Text here <a href="link here">Link<\/a><\/div>')
         
         
           var point = new google.maps.LatLng(36.509653404078676, -4.91289496421814);
          var marker = createMarker(point,'<div style="width:240px"Text here <a href="link here">Link<\/a><\/div>')
         
         
            var point = new google.maps.LatLng(36.508601,-4.875945);
          var marker = createMarker(point,'<div style="width:240px">Text here<a href="link here">Link<\/a><\/div>')      
         
    }
     
    var infowindow = new google.maps.InfoWindow(
      {
        size: new google.maps.Size(150,50)
      });
       
    function createMarker(latlng, html) {
        var contentString = html;
        var marker = new google.maps.Marker({
            position: latlng,
            map: map,
            zIndex: Math.round(latlng.lat()*-100000)<<5
            });
     
        google.maps.event.addListener(marker, 'click', function() {
            infowindow.setContent(contentString);
            infowindow.open(map,marker);
            });
    }
     
    </script>