javascript - Uncaught TypeError: Cannot read property 'documentElement' of null Googlemap -
i realise question asked before, however, have strange bug. trying output data googlemap pgsql. when write query parameters coming form, data not outputted. xml file being created , query works in phppgadmin. however, if same query hard-coded, data outputted. ask why happens here code.
<script type="text/javascript"> //<![cdata[ var customicons = { 7634: { icon: 'images/markers/1.png' }, 7644: { icon: 'images/markers/7.png' }, 7632: { icon: 'images/markers/8.png' }, 7633: { icon: 'images/markers/9.png' }, 7639: { icon: 'images/markers/10.png' }, 7646: { icon: 'images/markers/11.png' }, 7657: { icon: 'images/markers/12.png' }, 7649: { icon: 'images/markers/3.png' }, 7636: { icon: 'images/markers/4.png' }, 7648: { icon: 'images/markers/5.png' }, 7640: { icon: 'images/markers/6.png' }, 7650: { icon: 'images/markers/2.png' } }; function initmap() { var map = new google.maps.map(document.getelementbyid("map"), { center: new google.maps.latlng(39.295614,23.241548), zoom: 7, maptypeid: google.maps.maptypeid.roadmap, maptypecontrol: false, maptypecontroloptions: { style: google.maps.maptypecontrolstyle.horizontal_bar }, navigationcontrol: true, navigationcontroloptions: { style: google.maps.navigationcontrolstyle.small } }); var infowindow = new google.maps.infowindow(); // change depending on name of php file downloadurl("temr_1.php", function(data) { var xml = data.responsexml; var markers = xml.documentelement.getelementsbytagname("marker"); (var = 0; < markers.length; i++) { var veh = markers[i].getattribute("veh"); var speed = markers[i].getattribute("speed"); var cons = markers[i].getattribute("cons"); var co = markers[i].getattribute("co"); var point = new google.maps.latlng( parsefloat(markers[i].getattribute("lat")), parsefloat(markers[i].getattribute("lng"))); var html = "<b>" + veh + "</b> <br/>" + speed + "</b> <br/>" + cons + "</b> <br/>" + co; var icon = customicons[veh] || {}; var marker = new google.maps.marker({ map: map, position: point, icon: icon.icon }); bindinfowindow(marker, map, infowindow, html); } }); } function bindinfowindow(marker, map, infowindow, html) { google.maps.event.addlistener(marker, 'click', function() { infowindow.setcontent(html); infowindow.open(map, marker); }); } function downloadurl(url, callback) { var request = window.activexobject ? new activexobject('microsoft.xmlhttp') : new xmlhttprequest; request.onreadystatechange = function() { if (request.readystate == 4) { request.onreadystatechange = donothing; callback(request, request.status); } }; request.open('get', url, true); request.send(null); } function donothing() {} //]]> here php code query. variable $acase multiple selection box , array.
<?php $datefrom= $_post[date_from]; $acase = $_post[vehid]; $date_to = $_post[date_to]; foreach ($acase $a){ $counter++; } header("content-type: text/xml"); $dom = new domdocument("1.0"); $node = $dom->createelement("markers"); $parnode = $dom->appendchild($node); // opens connection mysql server $con= pg_connect("host=localhost port=5432 dbname=temr user=postgres password=evan"); if (!$con) { print("connection failed."); echo "failed"; exit; } $query = pg_query($con, "select * gps_data vehicleid in (".implode(',', $acase).")"); //$query = pg_query($con, "select * gps_data vehicleid in (7644,7632)"); -- works, same parameterised query if (!$query) { echo "oh no.\n"; exit; } while ($row = pg_fetch_assoc($query)){ $node = $dom->createelement("marker"); $newnode = $parnode->appendchild($node); $newnode->setattribute("veh",$row['vehicleid']); $newnode->setattribute("speed", $row['speed']); $newnode->setattribute("lat", $row['latitude']); $newnode->setattribute("lng", $row['longitude']); $newnode->setattribute("cons", $row['consumption']); $newnode->setattribute("dis", $row['distance']); $newnode->setattribute("co", $row['co2']); } echo $dom->savexml(); ?>
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