Display multiple locations on Google Map v3 using PHP MYSQL WHILE LOOP - php

Question

I have this code that was once working but now is not. It is for displaying multiple locations on a map using Google maps version 3, by getting the locations from a table in the database, and looping through them using a PHP WHILE loop. Only one location is being displayed. The code is as below:
<script type="text/javascript" src="http://maps.googleapis.com/maps/api/js?sensor=false"></script>
<script type="text/javascript">
var map ;
function initialize() {
var latlng = new google.maps.LatLng(53.933056, 9.503611);
var myOptions = {
zoom: 10,
center: latlng,
mapTypeId: google.maps.MapTypeId.ROADMAP
};
map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);
<?
$query = mysql_query("SELECT
markers.id,
markers.place,
markers.address,
markers.lat,
markers.lng,
markers.description,
markers.type,
images.id,
images.thumb_path,
images.main
FROM
markers,images
WHERE
markers.type = '".$type."'
AND markers.id = images.id
AND images.main = 1
");
$numRows = mysql_num_rows($query);
if($numRows > 0){
while($row = mysql_fetch_assoc($query)){
?>
var contentString = '<div id="content">'+
'<img src="<?=$row['thumb_path'];?>" width="100" height="100" hspace="2" align="left" />'+
'<h4><?=$row['place'];?></h4><p><?=$row['address'];?></p>'+
'<p align="right">More Details'+
'</div>';
var marker = add_marker(<?=$row['lat'];?>, <?=$row['lng'];?>,"<?=strtoupper($row['place']);?>",contentString);
marker.setMap(map);
<? } ?>
<? } ?>
}
function add_marker(lat,lng,title,box_html) {
var infowindow = new google.maps.InfoWindow({
content: box_html
});
var marker = new google.maps.Marker({
position: new google.maps.LatLng(lat,lng),
map: map,
title: title
});
google.maps.event.addListener(marker, 'click', function() {
infowindow.open(map,marker);
});
return marker;
}
Kindly assist.