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    <p>You need to create the map.markers array (this part not tested):</p> <pre><code> downloadUrl("phpsqlajax_genxml.php", function(data) { map.markers = []; var xml = data.responseXML; var markers = xml.documentElement.getElementsByTagName("marker"); for (var i = 0; i &lt; markers.length; i++) { var hname = markers[i].getAttribute("Hname"); var Phone = markers[i].getAttribute("Phone"); var point = new google.maps.LatLng(parseFloat(markers[i].getAttribute("Lat")), parseFloat(markers[i].getAttribute("Longt"))); var html = "&lt;b&gt;" + hname + "&lt;br/&gt;" + Phone + "&lt;/b&gt;"; var type = "bar"; var icon = customIcons[type] || {}; var marker = new google.maps.Marker({ map: map, position: point, icon: icon.icon, shadow: icon.shadow }); map.markers.push(marker); bindInfoWindow(marker, map, infoWindow, html); } }); </code></pre> <p>I would suggest using the <a href="https://developers.google.com/maps/documentation/javascript/geometry" rel="nofollow">geometry library</a> <a href="https://developers.google.com/maps/documentation/javascript/reference#spherical" rel="nofollow">computeDistanceBetween function</a></p> <pre><code>function find_closest_marker( event ) { var closestMarker = -1; var closestDistance = Number.MAX_VALUE; for( i=0;i&lt;map.markers.length; i++ ) { var distance = google.maps.geometry.spherical.computeDistanceBetween(gmarkers[i].getPosition(),event.latLng); if ( distance &lt; closestDistance ) { closestMarker = i; closestDistance = distance; } } allert(map.markers[closestMarker].title); } </code></pre> <p><a href="http://www.geocodezip.com/v3_MW_example_map3_closestMarker.html" rel="nofollow">working example</a></p>
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    1. COThank you so much for the working example. I tried to change the code as you said above(using the geometry library computeDistanceBetween function). But it didn't work. So, I just changed the whole code as given in your example. But now, the problem is that the sidebar and markers are not shown in the map. Side bar is left blank. The changed code is given above. Please help me to figure out where the problem is
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    2. COIf you want my help determining why your copy of my code doesn't work, provide a link to a live version that exhibits the problem.
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    3. COI've uploaded the code and xml file in google drive. Please check out this link : https://drive.google.com/folderview?id=0Bx_RFu3eZf9fcVdNOW80NUlNeTQ&usp=sharing
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