javascript - How to display location on markers of google maps when clicked? -


i have extracted latitude , logitude database tables , have shown on google maps markers.now want location displayed on markers when clicked.i tried lot couldn't find way.can please suggest how shall proceeed?i giving sample code may you.kindly me out.

<?php    $dbname='140dev';    $dbuser='root';                                   $dbpass='root';           $dbserver='localhost';     $dbcnx = mysql_connect ("$dbserver", "$dbuser", "$dbpass");        mysql_select_db("$dbname") or die(mysql_error());   $sql = mysql_query("select * tweets1"); $res =  mysql_fetch_array($sql); $lat_d = $res['geo_lat']; $long_d = $res['geo_long'];  // mimic result array mysql $result = array(array('geo_lat'=>$lat_d,'geo_long'=>$long_d));  ?> <!doctype html> <html> <head>     <script type="text/javascript"  src="http://maps.googleapis.com/maps/api/js?key="api_key"&sensor=false"></script>     <script type="text/javascript">     var map;     function initialize() {         // set static latitude, longitude value     var latlng = new google.maps.latlng(<?php echo $lat_d; ?>, <?php echo $long_d; ?>);         // set map options         var myoptions = {             zoom: 16,             center: latlng,             pancontrol: true,             zoomcontrol: true,             scalecontrol: true,             maptypeid: google.maps.maptypeid.roadmap         }         // create map object options         map = new google.maps.map(document.getelementbyid("map_canvas"), myoptions);     <?php         // uncomment 2 lines below real data db         $result = mysql_query("select * tweets1");         while ($row = mysql_fetch_array($result)) echo "addmarker(new google.maps.latlng(".$row['geo_lat'].", ".$row['geo_long']."),  map);";     ?>     }       function addmarker(latlng, map) {  var marker = new google.maps.marker({     position: latlng,     map: map,     draggable: true, // enables drag & drop     animation: google.maps.animation.drop });  var contentstring = latlng.lat() + " , " + latlng.lng();  geocoder.geocode({'latlng': latlng}, function(results, status) { if (status == google.maps.geocoderstatus.ok) {   if (results[1]) {     map.setzoom(11);     marker = new google.maps.marker({         position: latlng,         map: map     });     infowindow.setcontent(results[1].formatted_address);     infowindow.open(map, marker);   } else {     alert('no results found');   }  } else {   alert('geocoder failed due to: ' + status);  }  });  google.maps.event.addlistener(marker, 'click', function() {    infowindow.open(map,marker);  }); }     </script> </head> <body onload="initialize()">     <div style="float:left; position:relative; width:550px; border:0px #000 solid;">         <div id="map_canvas" style="width:950px;height:700px;border:solid black 1px;">        </div>     </div> </body> </html>

improve addmarker() function shows lat-lng values of clicked marker on infowindow:

function addmarker(latlng, map) {    var marker = new google.maps.marker({         position: latlng,         map: map,         draggable: true, // enables drag & drop         animation: google.maps.animation.drop     });      var contentstring = latlng.lat() + " - " + latlng.lng();      var infowindow = new google.maps.infowindow({        content: contentstring     });      google.maps.event.addlistener(marker, 'click', function() {        infowindow.open(map,marker);     }); }

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