Ref: Google maps V3: Display Colored Markers for particular type of location
<script type="text/javascript">
window.onload = function () {
var mapOptions = {
center: new google.maps.LatLng(markers[0].lat, markers[0].lng),
zoom: 8,
mapTypeId: google.maps.MapTypeId.ROADMAP
};
var infoWindow = new google.maps.InfoWindow();
var latlngbounds = new google.maps.LatLngBounds();
var map = new google.maps.Map(document.getElementById("dvMap"), mapOptions);
var i = 0;
var interval = setInterval(function () {
var data = markers[i]
var myLatlng = new google.maps.LatLng(data.lat, data.lng);
var icon = "";
switch (data.type) {
case "Normal":
icon = "blue";
break;
case "Danger":
icon = "red";
break;
case "Warning":
icon = "yellow";
break;
}
icon = "http://maps.google.com/mapfiles/ms/icons/" + icon + ".png";
var marker = new google.maps.Marker({
position: myLatlng,
map: map,
title: data.description,
animation: google.maps.Animation.DROP,
icon: new google.maps.MarkerImage(icon)
});
(function (marker, data) {
google.maps.event.addListener(marker, "Onmouseover", function (e) {
infoWindow.setContent(data.description).bold();
infoWindow.open(map, marker);
});
})(marker, data);
latlngbounds.extend(marker.position);
i++;
if (i == markers.length) {
clearInterval(interval);
var bounds = new google.maps.LatLngBounds();
map.setCenter(latlngbounds.getCenter());
map.fitBounds(latlngbounds);
}
}, 80);
}
</script>
