json - Google Maps Refresh Markers -

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i want refresh markers. used setinterval function. how delete markers? @ time markers added old markers ... thats not intended.

so code:

<!doctype html> <html>   <head>     <meta name="viewport" content="initial-scale=1.0, user-scalable=no" />     <style type="text/css">       html { height: 100% }       body { height: 100%; margin: 0; padding: 0 }       #map_canvas { height: 100% }     </style>     <script type="text/javascript"       src="http://maps.googleapis.com/maps/api/js?key=xyz&sensor=true">     </script>     <script type="text/javascript">       var map;       function initialize() {         var mapoptions = {           center: new google.maps.latlng(48.137, 11.577),           zoom: 14,           maptypeid: google.maps.maptypeid.roadmap         };         map = new google.maps.map(document.getelementbyid("map_canvas"),             mapoptions);       }     </script>     <script type="text/javascript" src="http://code.jquery.com/jquery-latest.min.js"></script>       </head>   <body onload="initialize()">     <div id="map_canvas" style="width:100%; height:100%"></div>     <script type="text/javascript"> setinterval(function() {       $(document).ready(function() {         $.getjson('./url.php', function(data) {           var cars = data.rec.vehicles.vehicles;           $.each(cars, function(key, data) {             var latlng = new google.maps.latlng(data.position.latitude, data.position.longitude);              var imageh = data.model;             var bild = "/" + imageh + ".png";             if(data.fuelstate <=25)               {bild="/empty.png";}             var bild1= "/" + imageh + "1.png";             var tanken1="";             if(data.fuelstate<=25){tanken1="tanken";}             console.log(bild);             var contentstring ='<h1>'+data.model+" "+data.carname+'</h1><img border="0" align="center" src="' + data.model + '1.png"><br><br>kennzeichen: '+ data.licenseplate +'<br>fahrgestellnummer: '+data.vin+'<br>fuellstand: ' + data.fuelstate + '% <img border="0" align="absmiddle" src="' + data.fuelstate + '.png"><br>zustand: <img border="0" align="absmiddle" src="' + data.innercleanliness + '.png"><br>adresse:  ' +data.address+'<br><a href="https://de.drive-now.com/php/metropolis/vehicle_details?vin='+ data.vin +'">dieses fahrzeug jetzt buchen!</a><br><br>'+tanken1;              var infowindow = new google.maps.infowindow({             content: contentstring             });             var marker = new google.maps.marker({                 position: latlng,                 title: data.model,                 icon: bild             });             google.maps.event.addlistener(marker, 'click', function()  {             infowindow.open(map,marker);             google.maps.event.addlistener(map, 'click', function() {if(infowindow){infowindow.close();}});             });              marker.setmap(map);           });         });       });       clearmarkers();       }, 10000);        $(document).ready(function() {         $.getjson('./petrolstations.txt', function(data) {           $.each(data, function(key, data) {             var latlng = new google.maps.latlng(data.lat, data.lng);              var bild1 = "/petrol.png";             var contentstring1 = data.name;             var infowindow = new google.maps.infowindow({             content: contentstring1             });             var marker = new google.maps.marker({                 position: latlng,                 title: data.lng,                 icon: bild1             });             google.maps.event.addlistener(marker, 'click', function()  {             infowindow.open(map,marker);             google.maps.event.addlistener(map, 'click', function() {if(infowindow){infowindow.close();}});             });              marker.setmap(map);           });         });       });     </script>   </body> </html>

thanks :))

keep references markers have been created (in array).

to remove them, iterate through array calling .setmap(null) on each marker.


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