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How can I add multiple searchBoxes in my google maps api web?

I'm trying to make a origin and destination menu, so the user will choose the locations in each input, and each input will add a marker to the map and then it will calculate the distance, this is my progress so far: I've successfully added a map with a search box, but I can't create another one and I don't know how to do this.
This is my code:
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
<script src="https://maps.googleapis.com/maps/api/js?key=MY_API_KEY&libraries=places"></script>
<div style="background-color: #FFC012">
<input type="text" id="orign" placeholder="origin">
<input type="text" id="destn" placeholder="destination">
<br>
<div id="map-canvas">
<script>
var map = new google.maps.Map(document.getElementById('map-canvas'),{
center:{
lat: 19.4978,
lng: -99.1269
},
zoom:15
});
var marker = new google.maps.Marker({
map:map,
draggable: false
});
if (navigator.geolocation) {
navigator.geolocation.getCurrentPosition(function (position) {
initialLocation = new google.maps.LatLng(position.coords.latitude, position.coords.longitude);
map.setCenter(initialLocation);
/*marker.setPosition(initialLocation); */
});
}
var searchBox = new google.maps.places.SearchBox(document.getElementById('orign'));
google.maps.event.addListener(searchBox, 'places_changed',function(){
var places = searchBox.getPlaces();
var bounds = new google.maps.LatLngBounds();
var i, place;
for(i=0; place=places[i];i++){
bounds.extend(place.geometry.location);
marker.setPosition(place.geometry.location);
}
map.fitBounds(bounds);
map.setZoom(15);
})
</script>
</div>
</div>

One option would be to start from the Autocomplete Directions Example in the documentation, change the Autocomplete objects to SearchBox objects, and the associated code to account for the differences (SearchBox has a places_changed event, Autocomplete has place_changed (singular); the routine to get the results also has a different name (singular vs. plural).
/**
* #constructor
*/
function AutocompleteDirectionsHandler(map) {
this.map = map;
this.originPlaceId = null;
this.destinationPlaceId = null;
this.travelMode = 'DRIVING';
this.directionsService = new google.maps.DirectionsService();
this.directionsRenderer = new google.maps.DirectionsRenderer();
this.directionsRenderer.setMap(map);
var originInput = document.getElementById('orign');
var destinationInput = document.getElementById('destn');
var originAutocomplete = new google.maps.places.SearchBox(originInput);
var destinationAutocomplete =
new google.maps.places.SearchBox(destinationInput);
this.setupPlaceChangedListener(originAutocomplete, 'ORIG');
this.setupPlaceChangedListener(destinationAutocomplete, 'DEST');
}
AutocompleteDirectionsHandler.prototype.setupPlaceChangedListener = function(
autocomplete, mode) {
var me = this;
autocomplete.bindTo('bounds', this.map);
autocomplete.addListener('places_changed', function() {
var places = autocomplete.getPlaces();
var place = places[0];
if (!place.place_id) {
window.alert('Please select an option from the dropdown list.');
return;
}
if (mode === 'ORIG') {
me.originPlaceId = place.place_id;
} else {
me.destinationPlaceId = place.place_id;
}
me.route();
});
};
Add a function to calculate the length of the returned route (from the question: Google Maps API: Total distance with waypoints):
function computeTotalDistance(result) {
var totalDist = 0;
var totalTime = 0;
var myroute = result.routes[0];
for (i = 0; i < myroute.legs.length; i++) {
totalDist += myroute.legs[i].distance.value;
totalTime += myroute.legs[i].duration.value;
}
totalDist = totalDist / 1000.
document.getElementById("total").innerHTML = "total distance is: " + totalDist + " km<br>total time is: " + (totalTime / 60).toFixed(2) + " minutes";
}
proof of concept fiddle
code snippet:
// This example requires the Places library. Include the libraries=places
// parameter when you first load the API. For example:
// <script
// src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&libraries=places">
function initMap() {
var map = new google.maps.Map(document.getElementById('map-canvas'), {
center: {
lat: 19.4978,
lng: -99.1269
},
zoom: 15
});
var marker = new google.maps.Marker({
map: map,
draggable: false
});
if (navigator.geolocation) {
navigator.geolocation.getCurrentPosition(function(position) {
initialLocation = new google.maps.LatLng(position.coords.latitude, position.coords.longitude);
map.setCenter(initialLocation);
/*marker.setPosition(initialLocation); */
});
}
new AutocompleteDirectionsHandler(map);
}
/**
* #constructor
*/
function AutocompleteDirectionsHandler(map) {
this.map = map;
this.originPlaceId = null;
this.destinationPlaceId = null;
this.travelMode = 'DRIVING';
this.directionsService = new google.maps.DirectionsService();
this.directionsRenderer = new google.maps.DirectionsRenderer();
this.directionsRenderer.setMap(map);
var originInput = document.getElementById('orign');
var destinationInput = document.getElementById('destn');
var originAutocomplete = new google.maps.places.SearchBox(originInput);
var destinationAutocomplete =
new google.maps.places.SearchBox(destinationInput);
this.setupPlaceChangedListener(originAutocomplete, 'ORIG');
this.setupPlaceChangedListener(destinationAutocomplete, 'DEST');
}
AutocompleteDirectionsHandler.prototype.setupPlaceChangedListener = function(
autocomplete, mode) {
var me = this;
autocomplete.bindTo('bounds', this.map);
autocomplete.addListener('places_changed', function() {
var places = autocomplete.getPlaces();
var place = places[0];
if (!place.place_id) {
window.alert('Please select an option from the dropdown list.');
return;
}
if (mode === 'ORIG') {
me.originPlaceId = place.place_id;
} else {
me.destinationPlaceId = place.place_id;
}
me.route();
});
};
AutocompleteDirectionsHandler.prototype.route = function() {
if (!this.originPlaceId || !this.destinationPlaceId) {
return;
}
var me = this;
this.directionsService.route({
origin: {
'placeId': this.originPlaceId
},
destination: {
'placeId': this.destinationPlaceId
},
travelMode: this.travelMode
},
function(response, status) {
if (status === 'OK') {
me.directionsRenderer.setDirections(response);
computeTotalDistance(response);
} else {
window.alert('Directions request failed due to ' + status);
}
});
};
// from Google Maps API: Total distance with waypoints
// https://stackoverflow.com/questions/12802202/google-maps-api-total-distance-with-waypoints
function computeTotalDistance(result) {
var totalDist = 0;
var totalTime = 0;
var myroute = result.routes[0];
for (i = 0; i < myroute.legs.length; i++) {
totalDist += myroute.legs[i].distance.value;
totalTime += myroute.legs[i].duration.value;
}
totalDist = totalDist / 1000.
document.getElementById("total").innerHTML = "total distance is: " + totalDist + " km<br>total time is: " + (totalTime / 60).toFixed(2) + " minutes";
}
/* Always set the map height explicitly to define the size of the div
* element that contains the map. */
#map-canvas {
height: 80%;
}
/* Optional: Makes the sample page fill the window. */
html,
body {
height: 100%;
margin: 0;
padding: 0;
}
<div style="background-color: #FFC012; height:100%; width:100%;">
<input type="text" id="orign" placeholder="origin" value="Lindavista Vallejo III Secc">
<input type="text" id="destn" placeholder="destination" value="Lienzo Charro de La Villa">
<div id="total"></div>
<br>
<div id="map-canvas"></div>
</div>
<!-- Replace the value of the key parameter with your own API key. -->
<script src="https://maps.googleapis.com/maps/api/js?key=AIzaSyCkUOdZ5y7hMm0yrcCQoCvLwzdM6M8s5qk&libraries=places&callback=initMap" async defer></script>

mark data in xml file on google maps

I want to mark some data on google map.
I use eclipse Java EE and xml file is in the same workspace;(workspace_jsp).
xml file:
<csv_data>
<row>
<time>10:01:43</time>
<latitude>37.4805016667</latitude>
<longitude>126.952741667</longitude>
<pdistance>0.000555</pdistance>
<totaldistance>0.000555</totaldistance>
<sectionspray>3343.0</sectionspray>
</row>
<row>
<time>10:01:57</time>
<latitude>37.4807483333</latitude>
<longitude>126.952753333</longitude>
<pdistance>0.027396</pdistance>
<totaldistance>0.027951</totaldistance>
<sectionspray>3320.0</sectionspray>
</row>
my code is
<!DOCTYPE html >
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
<meta http-equiv="content-type" content="text/html; charset=UTF-8"/>
<title>PHP/MySQL & Google Maps Example</title>
<script src="https://maps.googleapis.com/maps/api/js?key=~~~~"
type="text/javascript"></script>
<script type="text/javascript">
//<![CDATA[
var customIcons = {
restaurant: {
icon: 'http://labs.google.com/ridefinder/images/mm_20_blue.png'
},
bar: {
icon: 'http://labs.google.com/ridefinder/images/mm_20_red.png'
}
};
function load() {
var map = new google.maps.Map(document.getElementById("map"), {
center: new google.maps.LatLng(37.466285,126.948366),
zoom: 10,
mapTypeId: 'roadmap'
});
var infoWindow = new google.maps.InfoWindow;
// Change this depending on the name of your PHP file
downloadUrl("mark_info.xml", function(data) {
var xml = data.responseXML;
var markers = xml.documentElement.getElementsByTagName("/csv_data/row");
for (var i = 0; i < markers.length; i++) {
var time = markers[i].getAttribute("time");
var ss = markers[i].getAttribute("sectionspray");
var pd = markers[i].getAttribute("pdistance");
var td = markers[i].getAttribute("totaldistance");
var point = new google.maps.LatLng(
parseFloat(markers[i].getAttribute("latitude")),
parseFloat(markers[i].getAttribute("longitude")));
var html = "<b>" + time + "</b> <br/>" + ss + pd + td;
var icon = customIcons[pd] || {};
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() {}
//]]>
</script>
</head>
<body onload="load()">
<div id="map" style="width: 2500px; height: 1500px"></div>
</body>
</html>
map is loaded on browser(IE, CHrome) but marks and infowindow..
what is wrong and how can I fix it?? please help me..

Your xml is not formatted as xml attributes. You can't retrieve it using getAttribute. The data is the content of XML elements. I use a nodeValue function from geoxml3 to retrieve the text from the element. To get the element, you can use getElementsByTagName, which returns an array of elements, if there is only one, that will be [0].
var markers = xml.getElementsByTagName('row');
for (var i = 0; i < markers.length; i++) {
var time = nodeValue(markers[i].getElementsByTagName("time")[0]);
var ss = nodeValue(markers[i].getElementsByTagName("sectionspray")[0]);
var pd = nodeValue(markers[i].getElementsByTagName("pdistance")[0]);
var td = nodeValue(markers[i].getElementsByTagName("totaldistance")[0]);
var point = new google.maps.LatLng(
parseFloat(nodeValue(markers[i].getElementsByTagName('latitude')[0])),
parseFloat(nodeValue(markers[i].getElementsByTagName('longitude')[0])));
var html = "<b>" + time + "</b> <br/>" + ss + pd + td;
var icon = customIcons[pd] || {};
var marker = new google.maps.Marker({
map: map,
position: point,
icon: icon.icon
});
bindInfoWindow(marker, map, infoWindow, html);
}
proof of concept fiddle
code snippet:
var map;
var customIcons = {
restaurant: {
icon: 'http://labs.google.com/ridefinder/images/mm_20_blue.png'
},
bar: {
icon: 'http://labs.google.com/ridefinder/images/mm_20_red.png'
}
};
function initialize() {
map = new google.maps.Map(
document.getElementById("map_canvas"), {
center: new google.maps.LatLng(37.4419, -122.1419),
zoom: 13,
mapTypeId: google.maps.MapTypeId.ROADMAP
});
var infoWindow = new google.maps.InfoWindow;
var bounds = new google.maps.LatLngBounds();
var xml = xmlParse(xmlData);
var markers = xml.getElementsByTagName('row');
for (var i = 0; i < markers.length; i++) {
var time = nodeValue(markers[i].getElementsByTagName("time")[0]);
var ss = nodeValue(markers[i].getElementsByTagName("sectionspray")[0]);
var pd = nodeValue(markers[i].getElementsByTagName("pdistance")[0]);
var td = nodeValue(markers[i].getElementsByTagName("totaldistance")[0]);
var point = new google.maps.LatLng(
parseFloat(nodeValue(markers[i].getElementsByTagName('latitude')[0])),
parseFloat(nodeValue(markers[i].getElementsByTagName('longitude')[0])));
console.log(point.toUrlValue(6));
var html = "<b>" + time + "</b> <br/>" + ss + pd + td;
var icon = customIcons[pd] || {};
var marker = new google.maps.Marker({
map: map,
position: point,
icon: icon.icon
});
bounds.extend(point);
bindInfoWindow(marker, map, infoWindow, html);
}
map.fitBounds(bounds);
}
function bindInfoWindow(marker, map, infoWindow, html) {
google.maps.event.addListener(marker, 'click', function() {
infoWindow.setContent(html);
infoWindow.open(map, marker);
});
}
google.maps.event.addDomListener(window, "load", initialize);
function xmlParse(str) {
if (typeof ActiveXObject != 'undefined' && typeof GetObject != 'undefined') {
var doc = new ActiveXObject('Microsoft.XMLDOM');
doc.loadXML(str);
return doc;
}
if (typeof DOMParser != 'undefined') {
return (new DOMParser()).parseFromString(str, 'text/xml');
}
return createElement('div', null);
}
/**
* Extract the text value of a DOM node, with leading and trailing whitespace trimmed.
*
* #param {Element} node XML node/element.
* #param {Any} delVal Default value if the node doesn't exist.
* #return {String|Null}
*/
var nodeValue = function(node, defVal) {
var retStr = "";
if (!node) {
return (typeof defVal === 'undefined' || defVal === null) ? null : defVal;
}
if (node.nodeType == 3 || node.nodeType == 4 || node.nodeType == 2) {
retStr += node.nodeValue;
} else if (node.nodeType == 1 || node.nodeType == 9 || node.nodeType == 11) {
for (var i = 0; i < node.childNodes.length; ++i) {
retStr += arguments.callee(node.childNodes[i]);
}
}
return retStr;
}
var xmlData = '<csv_data><row><time>10:01:43</time><latitude>37.4805016667</latitude><longitude>126.952741667</longitude><pdistance>0.000555</pdistance><totaldistance>0.000555</totaldistance><sectionspray>3343.0</sectionspray></row><row><time>10:01:57</time><latitude>37.4807483333</latitude><longitude>126.952753333</longitude><pdistance>0.027396</pdistance><totaldistance>0.027951</totaldistance><sectionspray>3320.0</sectionspray></row>';
html,
body,
#map_canvas {
height: 100%;
width: 100%;
margin: 0px;
padding: 0px
}
<script src="https://maps.googleapis.com/maps/api/js"></script>
<div id="map_canvas"></div>

Google Maps V3: Updating Markers

I have some issues with Google maps api v3. I managed to create a map where new markers are displayed when the user drag the map. However, it do not delete the past markers. I have read many tutorials and thread (especially this one: Google Maps V3: Updating Markers Periodically) without success.
Here is my main page:
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
<meta http-equiv="content-type" content="text/html; charset=UTF-8" />
<title>Développez avec les API Google Maps</title>
<style type="text/css">
html {
height: 100%;
}
body {
height: 100%;
margin: 0px;
padding: 0px;
}
#map_canvas {
height: 100%;
}
</style>
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.4.4/jquery.js"></script>
<script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=false"></script>
<script type="text/javascript">
function createXmlHttpRequest() {
try {
if (typeof ActiveXObject != 'undefined') {
return new ActiveXObject('Microsoft.XMLHTTP');
} else if (window["XMLHttpRequest"]) {
return new XMLHttpRequest();
}
} catch (e) {
changeStatus(e);
}
return null;
};
function downloadUrl(url, callback) {
var status = -1;
var request = createXmlHttpRequest();
if (!request) {
return false;
}
request.onreadystatechange = function() {
if (request.readyState == 4) {
try {
status = request.status;
} catch (e) {
}
if (status == 200) {
callback(request.responseText, request.status);
request.onreadystatechange = function() {};
}
}
}
request.open('GET', url, true);
try {
request.send(null);
} catch (e) {
changeStatus(e);
}
};
function xmlParse(str) {
if (typeof ActiveXObject != 'undefined' && typeof GetObject != 'undefined') {
var doc = new ActiveXObject('Microsoft.XMLDOM');
doc.loadXML(str);
return doc;
}
if (typeof DOMParser != 'undefined') {
return (new DOMParser()).parseFromString(str, 'text/xml');
}
return createElement('div', null);
}
var map;
function initialize() {
var latlng = new google.maps.LatLng(46.7, 2.5);
var myOptions = {
zoom: 6,
center: latlng,
mapTypeId: google.maps.MapTypeId.ROADMAP
};
map = new google.maps.Map(document.getElementById('map_canvas'), myOptions);
downloadUrl("getPoi2.php", function(data) {
var xml = xmlParse(data);
var markers = xml.documentElement.getElementsByTagName("marker");
for (var i = 0; i < markers.length; i++) {
createMarker(parseFloat(markers[i].getAttribute("lat")), parseFloat(markers[i].getAttribute("lng")), markers[i].getAttribute('titre'));
}
});
/* Ici, on ajoute l'écouteur d'événement suite à un glisser / déposer */
google.maps.event.addListener(map, 'dragend', function() {
var bds = map.getBounds();
var South_Lat = bds.getSouthWest().lat();
var South_Lng = bds.getSouthWest().lng();
var North_Lat = bds.getNorthEast().lat();
var North_Lng = bds.getNorthEast().lng();
downloadUrl("getPoi.php?maxlat="+North_Lat+"&minlat="+South_Lat+"&minlong="+South_Lng+"&maxlong="+North_Lng, function(data) {
var xml = xmlParse(data);
var markers = xml.documentElement.getElementsByTagName("marker");
for (var i = 0; i < markers.length; i++) {
createMarker(parseFloat(markers[i].getAttribute("lat")), parseFloat(markers[i].getAttribute("lng")), markers[i].getAttribute('titre'));
}
});
});
}
function createMarker(lat, lng, titre){
var latlng = new google.maps.LatLng(lat, lng);
var marker = new google.maps.Marker({
position: latlng,
map: map,
title: titre
});
}
</script>
</head>
<body onload="initialize()">
<div id="map_canvas" style="width: 100%; height: 100%;"></div>
</body>
</html>
And there is my getPoin.php:
<?php
$user = "root";
$password = "";
$host = "localhost";
$bdd = "citiesinvaders";
mysql_connect($host,$user,$password);
mysql_select_db($bdd) or die("erreur de connexion à la base
de données");
$sql = "SELECT * FROM location order by city desc limit 1";
$res = mysql_query($sql) or die(mysql_error());
$dom = new DomDocument('1.0', 'utf-8');
$node = $dom->createElement("markers");
$parnode = $dom->appendChild($node);
while ($result = mysql_fetch_array($res)){
$node = $dom->createElement("marker");
$newnode = $parnode->appendChild($node);
$newnode->setAttribute("city", $result["city"]);
$newnode->setAttribute("lat", $result["latitude"]);
$newnode->setAttribute("lng", $result["longitude"]);
}
$xmlfile = $dom->saveXML();
echo $xmlfile;
?>
Thank you for your help!

Keep track of the google.maps.Marker objects created, delete them before creating new ones.
var map;
var gmarkers = [];
/* Ici, on ajoute l'écouteur d'événement suite à un glisser / déposer */
google.maps.event.addListener(map, 'dragend', function() {
var bds = map.getBounds();
var South_Lat = bds.getSouthWest().lat();
var South_Lng = bds.getSouthWest().lng();
var North_Lat = bds.getNorthEast().lat();
var North_Lng = bds.getNorthEast().lng();
downloadUrl("getPoi.php?maxlat="+North_Lat+"&minlat="+South_Lat+"&minlong="+South_Lng+"&maxlong="+North_Lng, function(data) {
var xml = xmlParse(data);
var markers = xml.documentElement.getElementsByTagName("marker");
// hide and delete the existing markers
for (var i=0; i<gmarkers.length; i++) {
gmarkers[i].setMap(null);
}
gmarkers = [];
for (var i = 0; i < markers.length; i++) {
createMarker(parseFloat(markers[i].getAttribute("lat")), parseFloat(markers[i].getAttribute("lng")), markers[i].getAttribute('titre'));
}
});
});
function createMarker(lat, lng, titre){
var latlng = new google.maps.LatLng(lat, lng);
var marker = new google.maps.Marker({
position: latlng,
map: map,
title: titre
});
// keep a reference to created markers so you can remove them
gmarkers.push(marker);
}

This is based on my understanding of your question... To clarify... When the map is moved the markers are placed over the old markers? A.K.A. They are 'doubling up' on map drag?
Create an array to hold the markers.
var markers = [];
Then, add the markers to the array in 'createMarker()' function. Also, check to see if a marker has already been created, and if so, do not recreate.
function createMarker(lat, lng, titre) {
for( marker in markers ) {
var coord = marker.getgetPosition();
if( coord.lat() == lat && coord.lng() == lng )
return;
}
var latlng = new google.maps.LatLng(lat, lng);
markers.push( new google.maps.Marker({
position: latlng,
map: map,
title: titre
}));
}

Javascript, set variable from contents of text box

I am trying to adapt this Google Maps distance calculator to my needs, but am not overly familiar with plain Javascript, and only Jquery.
I am trying to modify one of the destination variables so that it pulls it from a text box instead.
Usually the line reads :
var destinationA = 'pe219px';
But I am trying to change it to the following, usually I would do this with a keyup function to update the value as the person types in jquery, but im not sure what im doing in plain javascript. This is what I have come up with so far, but it doesn't appear to do a lot :
function setValue() {
destinationA=parseInt(document.getElementById('deliverypostcode').value);
}
This is the example I am trying to modify
https://developers.google.com/maps/documentation/javascript/examples/distance-matrix
This is the whole code :
<!DOCTYPE html>
<html>
<head>
<title>Distance Matrix service</title>
<script src="https://maps.googleapis.com/maps/api/js?v=3.exp&sensor=false"></script>
<style>
html, body {
height: 100%;
margin: 0;
padding: 0;
}
#map-canvas {
height: 100%;
width: 50%;
}
#content-pane {
float:right;
width:48%;
padding-left: 2%;
}
#outputDiv {
font-size: 11px;
}
</style>
<script>
var map;
var geocoder;
var bounds = new google.maps.LatLngBounds();
var markersArray = [];
var origin1 = new google.maps.LatLng(53.003604, -0.532764);
var origin2 = 'pe219px';
function setValue() {
destinationA=parseInt(document.getElementById('deliverypostcode').value);
}
var destinationB = new google.maps.LatLng(53.003604, -0.532764);
var destinationIcon = 'https://chart.googleapis.com/chart?chst=d_map_pin_letter&chld=D|FF0000|000000';
var originIcon = 'https://chart.googleapis.com/chart?chst=d_map_pin_letter&chld=O|FFFF00|000000';
function initialize() {
var opts = {
center: new google.maps.LatLng(53.003604, -0.532764),
zoom: 8
};
map = new google.maps.Map(document.getElementById('map-canvas'), opts);
geocoder = new google.maps.Geocoder();
}
function calculateDistances() {
var service = new google.maps.DistanceMatrixService();
service.getDistanceMatrix(
{
origins: [origin1, origin2],
destinations: [destinationA, destinationB],
travelMode: google.maps.TravelMode.DRIVING,
unitSystem: google.maps.UnitSystem.IMPERIAL,
avoidHighways: false,
avoidTolls: false
}, callback);
}
function callback(response, status) {
if (status != google.maps.DistanceMatrixStatus.OK) {
alert('Error was: ' + status);
} else {
var origins = response.originAddresses;
var destinations = response.destinationAddresses;
var outputDiv = document.getElementById('outputDiv');
outputDiv.innerHTML = '';
deleteOverlays();
for (var i = 0; i < origins.length; i++) {
var results = response.rows[i].elements;
addMarker(origins[i], false);
for (var j = 0; j < results.length; j++) {
addMarker(destinations[j], true);
outputDiv.innerHTML += origins[i] + ' to ' + destinations[j]
+ ': ' + results[j].distance.text + '<br>';
}
}
}
}
function addMarker(location, isDestination) {
var icon;
if (isDestination) {
icon = destinationIcon;
} else {
icon = originIcon;
}
geocoder.geocode({'address': location}, function(results, status) {
if (status == google.maps.GeocoderStatus.OK) {
bounds.extend(results[0].geometry.location);
map.fitBounds(bounds);
var marker = new google.maps.Marker({
map: map,
position: results[0].geometry.location,
icon: icon
});
markersArray.push(marker);
} else {
alert('Geocode was not successful for the following reason: '
+ status);
}
});
}
function deleteOverlays() {
for (var i = 0; i < markersArray.length; i++) {
markersArray[i].setMap(null);
}
markersArray = [];
}
google.maps.event.addDomListener(window, 'load', initialize);
</script>
</head>
<body>
<div id="content-pane">
<div id="inputs">
<form name="form1" method="post" action="">
<label for="deliverypostcode">Your Postcode</label>
<input type="text" name="deliverypostcode" id="deliverypostcode">
</form>
<p><button type="button" onclick="calculateDistances();">Calculate
distances</button></p>
</div>
<div id="outputDiv"></div>
</div>
<div id="map-canvas"></div>
</body>
</html>

Your function setValue is never called.
What if you delete it and just place the following line at the begining of calculateDistances ?
var destinationA= document.getElementById('deliverypostcode').value;
This works for me. Also, you don't need to parseInt your text input. Geocoding converts strings to a lat/long coordinates.

Google map api search markers from database in specifc area

I've set up google map API that loads data from mysql database and display markers. the problem I am facing is that all the markers shows up at once no matter whatever I input in search location field.............. I want to show only the searched area and markers in that area. It shouldn't display all the markers at once but only the marker in the searched area.
I mean I want to zoom the map to the searched area. Currently if I've only one marker map zoom in to show that but if I've many markers the map zoom out to show all the markers. Here is the map I'm working on "http://funfeat.com/clients/gmap/gmap3.html" NOW I've set markers very very far and the map is still showing all the markers by zooming out.
The gmap.php is the file that provide xml results from mysql database. and the below code is what I am using to display map
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8"/>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
<title>Google Maps AJAX + mySQL/PHP Example</title>
<script src="http://maps.googleapis.com/maps/api/js?sensor=false"
type="text/javascript"></script>
<script type="text/javascript">
//<![CDATA[
var map;
var markers = [];
var infoWindow;
var locationSelect;
function load() {
map = new google.maps.Map(document.getElementById("map"), {
center: new google.maps.LatLng(40, -100),
zoom: 10,
mapTypeId: 'roadmap',
mapTypeControlOptions: {style: google.maps.MapTypeControlStyle.DROPDOWN_MENU}
});
infoWindow = new google.maps.InfoWindow();
locationSelect = document.getElementById("locationSelect");
locationSelect.onchange = function() {
var markerNum = locationSelect.options[locationSelect.selectedIndex].value;
if (markerNum != "none"){
google.maps.event.trigger(markers[markerNum], 'click');
}
};
}
function searchLocations() {
var address = document.getElementById("addressInput").value;
var geocoder = new google.maps.Geocoder();
geocoder.geocode({address: address}, function(results, status) {
if (status == google.maps.GeocoderStatus.OK) {
searchLocationsNear(results[0].geometry.location);
} else {
alert(address + ' not found');
}
});
}
function clearLocations() {
infoWindow.close();
for (var i = 0; i < markers.length; i++) {
markers[i].setMap(null);
}
markers.length = 0;
locationSelect.innerHTML = "";
var option = document.createElement("option");
option.value = "none";
option.innerHTML = "See all results:";
locationSelect.appendChild(option);
}
function searchLocationsNear(center) {
clearLocations();
var radius = document.getElementById('radiusSelect').value;
var searchUrl = 'gmap.php?lat=' + center.lat() + '&lng=' + center.lng() + '&radius=' + radius;
downloadUrl(searchUrl, function(data) {
var xml = parseXml(data);
var markerNodes = xml.documentElement.getElementsByTagName("marker");
var bounds = new google.maps.LatLngBounds();
for (var i = 0; i < markerNodes.length; i++) {
var name = markerNodes[i].getAttribute("name");
var address = markerNodes[i].getAttribute("address");
var distance = parseFloat(markerNodes[i].getAttribute("distance"));
var latlng = new google.maps.LatLng(
parseFloat(markerNodes[i].getAttribute("lat")),
parseFloat(markerNodes[i].getAttribute("lng")));
createOption(name, distance, i);
createMarker(latlng, name, address);
bounds.extend(latlng);
}
map.fitBounds(bounds);
locationSelect.style.visibility = "visible";
locationSelect.onchange = function() {
var markerNum = locationSelect.options[locationSelect.selectedIndex].value;
google.maps.event.trigger(markers[markerNum], 'click');
};
});
}
function createMarker(latlng, name, address) {
var html = "<b>" + name + "</b> <br/>" + address;
var marker = new google.maps.Marker({
map: map,
position: latlng
});
google.maps.event.addListener(marker, 'click', function() {
infoWindow.setContent(html);
infoWindow.open(map, marker);
});
markers.push(marker);
}
function createOption(name, distance, num) {
var option = document.createElement("option");
option.value = num;
option.innerHTML = name + "(" + distance.toFixed(1) + ")";
locationSelect.appendChild(option);
}
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.responseText, request.status);
}
};
request.open('GET', url, true);
request.send(null);
}
function parseXml(str) {
if (window.ActiveXObject) {
var doc = new ActiveXObject('Microsoft.XMLDOM');
doc.loadXML(str);
return doc;
} else if (window.DOMParser) {
return (new DOMParser).parseFromString(str, 'text/xml');
}
}
function doNothing() {}
//]]>
</script>
</head>
<body style="margin:0px; padding:0px;" onLoad="load()">
<div>
<input type="text" id="addressInput" size="10"/>
<select id="radiusSelect">
<option value="25" selected>25mi</option>
<option value="100">100mi</option>
<option value="200">200mi</option>
</select>
<input type="button" onClick="searchLocations()" value="Search"/>
</div>
<div><select id="locationSelect" style="width:100%;visibility:hidden"></select></div>
<div id="map" style="width: 100%; height: 80%"></div>
</body>
</html>

http://funfeat.com/clients/gmap/gmap.php?lat=47&lng=-122&radius=2 produces valid XML but your query must be wrong .It pulls out 10 markers, 9 of which are correct but the 10th produces <marker name="Pakistan" address="Chowk Azam, Layyah" lat="31.008364" lng="71.224342" type="cITY"/> which is certainly not within 2 miles of the coordinates. Your query should not pick up the last marker from the database.
As the use of mysql_ functions are discouraged the following code uses PDO can be used
//dependant on your setup
$host= "WWW";
$username="XXX";
$password="YYY";
$database="ZZZ";
// Get parameters from URL
$center_lat = $_GET["lat"];
$center_lng = $_GET["lng"];
$radius = $_GET["radius"];
// Start XML file, create parent node
$dom = new DOMDocument("1.0");
$node = $dom->createElement("markers");
$parnode = $dom->appendChild($node);
//Connect to database
$dbh = new PDO("mysql:host=$host;dbname=$database", $username, $password);
$dbh->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
try {
// Prepare statement
$stmt = $dbh->prepare("SELECT name, lat, lng, ( 3959 * acos( cos( radians(?) ) * cos( radians( lat ) ) * cos( radians( lng ) - radians(?) ) + sin( radians(?) ) * sin( radians( lat ) ) ) ) AS distance FROM gbstn HAVING distance < ? ORDER BY distance ASC LIMIT 0 , 20");
// Assign parameters
$stmt->bindParam(1,$center_lat);
$stmt->bindParam(2,$center_lng);
$stmt->bindParam(3,$center_lat);
$stmt->bindParam(4,$radius);
//Execute query
$stmt->setFetchMode(PDO::FETCH_ASSOC);
$stmt->execute();
EDIT Added to catch error if no records found
if ($stmt->rowCount()==0) {
$node = $dom->createElement("marker");
$newnode = $parnode->appendChild($node);
$newnode->setAttribute("name", "No Records Found");
$newnode->setAttribute("lat", $center_lat);//Sends marker to search location
$newnode->setAttribute("lng", $center_lng);
$newnode->setAttribute("distance", 0);
}
else {
End of EDIT
// Iterate through the rows, adding XML nodes for each
while($row = $stmt->fetch()) {
$node = $dom->createElement("marker");
$newnode = $parnode->appendChild($node);
$newnode->setAttribute("name", $row['name']);
$newnode->setAttribute("address", $row['address']);
$newnode->setAttribute("lat", $row['lat']);
$newnode->setAttribute("lng", $row['lng']);
$newnode->setAttribute("distance", $row['distance']);
}
}
echo $dom->saveXML();
}
catch(PDOException $e) {
echo "I'm sorry I'm afraid you can't do that.". $e->getMessage() ;// Remove or modify after testing
file_put_contents('PDOErrors.txt',date('[Y-m-d H:i:s]').", gmap.php, ". $e->getMessage()."\r\n", FILE_APPEND);
}
//Close the connection
$dbh = null;
The part of the query above HAVING distance < '%s' is the part that should weed out the last marker.
I have added Error catch if no records are found in search and Map sent to lat/lng 0,0. See My Implementation Here