I am using the code below to populate a Google Map with markers for all the lat and lng values I hold in a MySQL database.
What I would like to do, if at all possible, is to extend this a little more and have the ability to show different coloured markers dependent on a field value, to be more specific, if the value in the field ‘finds’ is zero then it will be one colour, but if it has a value of one or greater for it to be another colour.
I’ve found how to do this if the field value is a text value but not numeric. I’ve tried to change my code, to how (from a beginners perspective) I thought it might be be, but I can’t get this to work.
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>All Locations</title>
<link rel="stylesheet" href="css/style.css" type="text/css" media="all" />
<script type="text/javascript"
src="http://maps.google.com/maps/api/js?sensor=false&language=en"></script>
<script type="text/javascript">
var customIcons = {
if 'finds'.value=0: {
icon: 'http://labs.google.com/ridefinder/images/mm_20_blue.png',
shadow: 'http://labs.google.com/ridefinder/images/mm_20_shadow.png'
},
else {
icon: 'http://labs.google.com/ridefinder/images/mm_20_red.png',
shadow: 'http://labs.google.com/ridefinder/images/mm_20_shadow.png'
}
};
function load() {
var map = new google.maps.Map(document.getElementById("map"), {
center: new google.maps.LatLng(54.312195845815246,-4.45948481875007),
zoom:6,
mapTypeId: 'roadmap'
});
// Change this depending on the name of your PHP file
downloadUrl("phphfile.php", function(data) {
var xml = data.responseXML;
var markers = xml.documentElement.getElementsByTagName("marker");
for (var i = 0; i < markers.length; i++) {
var name = markers[i].getAttribute("locationname");
var address = markers[i].getAttribute("address");
var findsvalue = markers[i].getAttribute("finds");
var point = new google.maps.LatLng(
parseFloat(markers[i].getAttribute("osgb36lat")),
parseFloat(markers[i].getAttribute("osgb36lon")));
var marker = new google.maps.Marker({
map: map,
position: point,
icon: icon.icon,
shadow: icon.shadow
});
}
});
}
function downloadUrl(url, callback) {
var request = window.ActiveXObject ?
new ActiveXObject('Microsoft.XMLHTTP') :
new XMLHttpRequest;
request.onreadystatechange = function() {
if (request.readyState == 4) {
request.onreadystatechange = doNothing;
callback(request, request.status);
}
};
request.open('GET', url, true);
request.send(null);
}
function doNothing() {}
</script>
</head>
<body onLoad="load()">
<div id="map"></div>
</body>
</html>
This was a lot simpler than I thought.
It was just a case of replacing the text with the numeric value.
Chris