<h1>Trifid interactive map</h1>

    <!-- Aladin Lite CSS style file -->
    <link rel="stylesheet" href="https://aladin.u-strasbg.fr/AladinLite/api/v2/latest/aladin.min.css" />

    <!-- Aladin Lite has a dependency on the jQuery library -->
    <script type="text/javascript" src="https://code.jquery.com/jquery-1.9.1.min.js" charset="utf-8"></script>

    <!-- Aladin Lite container at requested dimensions -->
    <div id="aladin-lite-div" style="width:700px;height:400px;"></div>

    <input id="DSS" type="radio" name="survey" value="P/DSS2/color" checked><label for="DSS">DSS color<label>
    <input id="DSS-blue" type="radio" name="survey" value="P/DSS2/blue"><label for="DSS-blue">DSS blue<label>
    <input id="2MASS" type="radio" name="survey" value="P/2MASS/color"><label for="2MASS">2MASS<label>
    <input id="allwise" type="radio" name="survey" value="P/allWISE/color"><label for="allwise">AllWISE<label>
    <input id="glimpse" type="radio" name="survey" value="P/GLIMPSE360"><label for="glimpse">GLIMPSE 360<label>


    <!-- Aladin Lite JS code -->
    <script type="text/javascript" src="https://aladin.u-strasbg.fr/AladinLite/api/v2/latest/aladin.min.js" charset="utf-8"></script>

    <!-- Creation of Aladin Lite instance with initial parameters -->
    <script type="text/javascript">
        var aladin = A.aladin('#aladin-lite-div', {survey: "P/DSS2/color", fov:1.5, target: "M 20"});

        $('input[name=survey]').change(function() {
            aladin.setImageSurvey($(this).val());
        });

        var marker1 = A.marker(270.332621, -23.078944, {popupTitle: 'PSR B1758-23', popupDesc: 'Object type: Pulsar'});
        var marker2 = A.marker(270.63206, -22.905550, {popupTitle: 'HD 164514', popupDesc: 'Object type: Star in cluster'});
        var marker3 = A.marker(270.598121, -23.030819, {popupTitle: 'HD 164492', popupDesc: 'Object type: Double star'});
        var markerLayer = A.catalog({color: '#800080'});
        aladin.addCatalog(markerLayer);
        markerLayer.addSources([marker1, marker2, marker3]);
    </script>