extremegroundhopping

<script src="http://www.google.com/jsapi"></script>
<script>
    var fullname = new Array();
    var places = new Array();
    var latlngData = new Array();
</script>
<script src="[your-path-details-here]/geomapData.php"></script>
<script src="[your-path-details-here]/markerclustererV3.js"></script>
<script type="text/javascript">
    google.load('maps', '3', {
            other_params: 'sensor=false'
        });
 
    google.setOnLoadCallback(initialize);
 
    var markerClusterer = null;
    var map = null;
    var imageUrl = '[your-path-details-here]mapMarker.png';
 
    // *************************************************************
    // Map initialisation
    // *************************************************************
 
    function initialize() {
        map = new google.maps.Map(document.getElementById('map'), {
                zoom: 2,
                center: new google.maps.LatLng(20, 0),
                mapTypeId: google.maps.MapTypeId.TERRAIN
            });
 
        var markers = [];
 
        var markerImage = new google.maps.MarkerImage(imageUrl, new google.maps.Size(32, 37));
 
 
        // Loop through all lat/lngs to be mapped
        for (var i = 1; i < latlngData.length; ++i) {
            if (latlngData[i].substring(0, 6) != 'Error:') {
 
                // Was more than one player born here?
                var howMany = countvalues(places)[places[i]];
 
                var latlngSplit = latlngData[i].split(',');
                var latlng = new google.maps.LatLng(latlngSplit[0], latlngSplit[1])
 
                // If more than one player born here add details of all players
                // born here to each markers title
                if (howMany > 1) {
                    var count = 0;
                    var title = howMany + ' players born in ' + places[i] + ': ';
                    for (var z = 1; z < places.length; ++z) {
                        if (places[z] == places[i]) {
                            count++;
                            if (count == 1) {
                                title = title + '(' + count + ') ' + fullname[z];
                            } else {
                                title = title + ', ' + '(' + count + ') ' + fullname[z];
                            }
                        }
                    }
 
                    // If just one player born here set the title to his name and
                    // place of birth
                } else {
                    var title = fullname[i].toUpperCase() + ' ' + places[i];
                }
 
                // Create the marker
                var marker = new google.maps.Marker({
                        position: latlng,
                        draggable: true,
                        icon: markerImage,
                        title: title
                    });
 
                // put marker details in an array (for use by markerClusterer)
                markers.push(marker);
 
            }
        }
 
        // Istantiate marker clusterer
        markerClusterer = new MarkerClusterer(map, markers, {
                maxZoom: 10
            });
 
    }
 
    // ******************************************************************************************************
    // Count the number of occurences of each unique value in an array
    // ******************************************************************************************************
 
    function countvalues(a) {
        var b = {}, i = a.length,
            j;
        while (i--) {
            j = b[a[i]];
            b[a[i]] = j ? j + 1 : 1;
        }
        return b;
    }
</script>