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POUpdate PHP <input> field from JavaScript with a GMaps Marker position
 

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    <p>I've managed to add markers to a Google Map on click, but now I need to update an <code>&lt;input&gt;</code> field inside a form each time a new marker is placed. So, when a new marker is placed, the input in question is updated with the latitude and longitude of the marker.</p> <p>I'm using Google Maps Javascript API v3.</p> <p>Here's my Javascript:</p> <pre><code>&lt;script type="text/javascript"&gt; function load() { var map = new google.maps.Map(document.getElementById("map"), { center: new google.maps.LatLng(39.47860556892209,-3.328857421875), zoom: 7, mapTypeId: 'roadmap' }); var infoWindow = new google.maps.InfoWindow; google.maps.event.addListener(map, 'click', function(event) { //NEITHER OF THESE 2 OPTIONS WORK cambiarMarker(event.latLng); //document.getElementById("lat").value = event.latLng.lat(); //document.getElementById("lng").value = levent.latLng.lng(); document.forms['insertData'].lati.value = location.lat(); document.forms['insertData'].long.value = location.lng(); }); var markerActual; function cambiarMarker(location) { //CREATES AND PUT THE NEW MARKER } downloadUrl("phpsqlajax_genxml2.php", function(data) { //GETS INFO FROM AN XML THAT IS CREATED FROM THE DATABASE WITH PHP } function bindInfoWindow(marker, map, infoWindow, html) { //BINDS INFORMATION WINDOW WITH THE XML INFO } function downloadUrl(url, callback) { //GET THE XML FILE } function parseXml(str) { //PARSES FROM THE XML } function doNothing() {} &lt;/script&gt; </code></pre> <p>And here's my HTML:</p> <pre><code>&lt;body onload="load()"&gt; Aqui debería salir algo &lt;div id="map" style="width: 500px; height: 300px"&gt;&lt;/div&gt; &lt;form name="insertData" action="insertar_datos.php" method="post"&gt; Nombre: &lt;input type="text" name="name"&gt;&lt;br&gt; Dirección: &lt;input type="text" name="address"&gt;&lt;br&gt; Latitud: &lt;input type="text" name="lati" id="lat"&gt;&lt;br&gt; &lt;!--HERE'S INPUT1-LATITUDE--&gt; Longitud: &lt;input type="text" name="long" id="lng"&gt;&lt;br&gt; &lt;!--HERE'S INPUT2-LONG--&gt; Teléfono de contacto: &lt;input type="text" name="telefono"&gt;&lt;br&gt; Comentario: &lt;textarea name="comentario"&gt;&lt;/textarea&gt;&lt;br&gt; &lt;input type="submit" value="Enviar"&gt; &lt;/form&gt; &lt;/body&gt; </code></pre>
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