JavaScript - Javascript Image Maps

Hello chaps, I'm Nick

I'm in the process of creating a web app using Google Maps. What the following code should do is retrieve some xml code from a page, then load it on to the map, using the geocoder to get lat/long values from the address. Most of it's just Google code I've mauled about with.

The map loads, but none of the markers load on to the map. I've gone to the php page which generates the XML for the markers and all is fine there. I know the code is a messy crock of junk, I was sort of concentrating on trying to make it work then I'll sort out the nomenclature. Bad methodology, I know.

Code:

var id = null;
    var adress = null;
    var image = null;
    var point = null;
    var pointer = null;
    var geocoder = null;

    var iconBlue = new GIcon(); 
    iconBlue.image = 'http://labs.google.com/ridefinder/images/mm_20_blue.png';
    iconBlue.shadow = 'http://labs.google.com/ridefinder/images/mm_20_shadow.png';
    iconBlue.iconSize = new GSize(12, 20);
    iconBlue.shadowSize = new GSize(22, 20);
    iconBlue.iconAnchor = new GPoint(6, 20);
    iconBlue.infoWindowAnchor = new GPoint(5, 1);

    var iconRed = new GIcon(); 
    iconRed.image = 'http://labs.google.com/ridefinder/images/mm_20_red.png';
    iconRed.shadow = 'http://labs.google.com/ridefinder/images/mm_20_shadow.png';
    iconRed.iconSize = new GSize(12, 20);
    iconRed.shadowSize = new GSize(22, 20);
    iconRed.iconAnchor = new GPoint(6, 20);
    iconRed.infoWindowAnchor = new GPoint(5, 1);

    var customIcons = [];
    customIcons["restaurant"] = iconBlue;
    customIcons["bar"] = iconRed;
        
    function load() {
      if (GBrowserIsCompatible()) {
        map = new GMap2(document.getElementById("map"));
        map.addControl(new GSmallMapControl());
        map.addControl(new GMapTypeControl());
        map.setCenter(new GLatLng(52.2725, -0.8825), 12);
        geocoder = new GClientGeocoder();
        
        GDownloadUrl("phpsqlajax_genxml3.php", function(data) {
          var xml = GXml.parse(data);
          var markers = xml.documentElement.getElementsByTagName("marker");
          for (var i = 0; i < markers.length; i++) {
            id = markers[i].getAttribute("ID");
            address = markers[i].getAttribute("ADDRESS");
            image = markers[i].getAttribute("IMAGE");
            var point3 = showAddress(address);
            var marker = createMarker(pointer, id, address, image);
            map.addOverlay(marker);
          }
        });
      }
    }
    
    function showAddress(address) {
	point = geocoder.getLatLng(address,function(point) {
		if (!point) {
			alert(address + " not found");
		} 
		else 
		{
			pointer = new GLatLng(point);
			return pointer;
		}
	});
}

    function createMarker(pointer, id, address, image) {
      var marker4 = new GMarker(pointer);
      var html = "<b>" + id + "</b> <br/>" + address + "</b> <br/>" + image;
      GEvent.addListener(marker, 'click', function() {
        marker4.openInfoWindowHtml(html);
      });
      return marker4;
    }

Thanks in advance

Firstly I know this is a PHP issue yet it is within javascript and IMO is the root cause of the problem.

I'm trying to output markers from a search query of locations from my database, onto a Google Map (api v.3) using a tut I found http://tips4php.net/2010/10/use-php-...g-data-on-map/

When adding this to my page I'm getting Undefined index:errors.

I have changed the variables in the php part of the script to suit my database yet have left everything else alone, cant figure out why I'm still getting a blank map????

Please help....

My code with errors being shown at bottom;

Code:

<script src="http://maps.google.com/maps/api/js?v=3&sensor=false" type="text/javascript"></script>
<script type="text/javascript"> 
 var icon = new google.maps.MarkerImage("http://maps.google.com/mapfiles/ms/micons/blue.png",
 new google.maps.Size(32, 32), new google.maps.Point(0, 0),
 new google.maps.Point(16, 32));
 var center = null;
 var map = null;
 var currentPopup;
 var bounds = new google.maps.LatLngBounds();
 function addMarker(lat, lng, info) {
 var pt = new google.maps.LatLng(lat, lng);
 bounds.extend(pt);
 var marker = new google.maps.Marker({
 position: pt,
 icon: icon,
 map: map
 });
 var popup = new google.maps.InfoWindow({
 content: info,
 maxWidth: 300
 });
 google.maps.event.addListener(marker, "click", function() {
 if (currentPopup != null) {
 currentPopup.close();
 currentPopup = null;
 }
 popup.open(map, marker);
 currentPopup = popup;
 });
 google.maps.event.addListener(popup, "closeclick", function() {
 map.panTo(center);
 currentPopup = null;
 });
 }
 function initMap() {
 map = new google.maps.Map(document.getElementById("map"), {
 center: new google.maps.LatLng(0, 0),
 zoom: 14,
 mapTypeId: google.maps.MapTypeId.ROADMAP,
 mapTypeControl: false,
 mapTypeControlOptions: {
 style: google.maps.MapTypeControlStyle.HORIZONTAL_BAR
 },
 navigationControl: true,
 navigationControlOptions: {
 style: google.maps.NavigationControlStyle.SMALL
 }
 });
 <br />
<b>Notice</b>:  Undefined index:  name in <b>D:\www\ofcftp\familysupport-results.php</b> on line <b>73</b><br />
<br />
<b>Notice</b>:  Undefined index:  lng in <b>D:\www\ofcftp\familysupport-results.php</b> on line <b>75</b><br />
<br />
<b>Notice</b>:  Undefined index:  info in <b>D:\www\ofcftp\familysupport-results.php</b> on line <b>76</b><br />
addMarker(53.994709, ,'<b></b><br/>');
<br />
<b>Notice</b>:  Undefined index:  name in <b>D:\www\ofcftp\familysupport-results.php</b> on line <b>73</b><br />
<br />
<b>Notice</b>:  Undefined index:  lng in <b>D:\www\ofcftp\familysupport-results.php</b> on line <b>75</b><br />
<br />
<b>Notice</b>:  Undefined index:  info in <b>D:\www\ofcftp\familysupport-results.php</b> on line <b>76</b><br />
addMarker(53.985416, ,'<b></b><br/>');
<br />
<b>Notice</b>:  Undefined index:  name in <b>D:\www\ofcftp\familysupport-results.php</b> on line <b>73</b><br />
<br />
<b>Notice</b>:  Undefined index:  lng in <b>D:\www\ofcftp\familysupport-results.php</b> on line <b>75</b><br />
<br />
<b>Notice</b>:  Undefined index:  info in <b>D:\www\ofcftp\familysupport-results.php</b> on line <b>76</b><br />
addMarker(53.985416, ,'<b></b><br/>');
<br />
<b>Notice</b>:  Undefined index:  name in <b>D:\www\ofcftp\familysupport-results.php</b> on line <b>73</b><br />
<br />
<b>Notice</b>:  Undefined index:  lng in <b>D:\www\ofcftp\familysupport-results.php</b> on line <b>75</b><br />
<br />
<b>Notice</b>:  Undefined index:  info in <b>D:\www\ofcftp\familysupport-results.php</b> on line <b>76</b><br />
addMarker(0.000000, ,'<b></b><br/>');
<br />
<b>Notice</b>:  Undefined index:  name in <b>D:\www\ofcftp\familysupport-results.php</b> on line <b>73</b><br />
<br />
<b>Notice</b>:  Undefined index:  lng in <b>D:\www\ofcftp\familysupport-results.php</b> on line <b>75</b><br />
<br />
<b>Notice</b>:  Undefined index:  info in <b>D:\www\ofcftp\familysupport-results.php</b> on line <b>76</b><br />
addMarker(0.000000, ,'<b></b><br/>');
 center = bounds.getCenter();
 map.fitBounds(bounds);

 }
 </script>

I pulled this code from Google's example section to make markers on a v3 Google Maps API (I have added my own lat/long points and corresponding event listeners, of course, but this is still the spirit of the code): Code:

<script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=false"></script>
<script type="text/javascript">
  var map;
  function initialize() {
    var map_center = new google.maps.LatLng(39.2,-84.479381);
     var store1 = new google.maps.LatLng(39.112456,-84.574779);
    var store2 = new google.maps.LatLng(39.314153,-84.261379);
    var store3 = new google.maps.LatLng(39.197099,-84.667579);
    var store4 = new google.maps.LatLng(39.16836,-84.479381); 
    var myOptions = {
      zoom: 10,
      center: map_center,
      mapTypeId: google.maps.MapTypeId.ROADMAP
    }
    map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);

     var marker1 = new google.maps.Marker({
        position: store1, 
        map: map, 
        title:"Store 1"
    });
    var marker2 = new google.maps.Marker({
        position: store2, 
        map: map, 
        title:"Store 2"
    });
    var marker3 = new google.maps.Marker({
        position: store3, 
        map: map, 
        title:"Store 3"
    });
    var marker4 = new google.maps.Marker({
        position: store4, 
        map: map, 
        title:"Store 4"
    }); 
    google.maps.event.addListener(marker1, 'click', function() {
      map.set_center(store1);
      map.set_zoom(16);
    });
    google.maps.event.addListener(marker2, 'click', function() {
      map.set_center(store2);
      map.set_zoom(16);
    });
    google.maps.event.addListener(marker3, 'click', function() {
      map.set_center(store3);
      map.set_zoom(16);
    });
    google.maps.event.addListener(marker4, 'click', function() {
      map.set_center(store4);
      map.set_zoom(16);
    });
  }
</script>

This works without fail, but when I try to use a javascript array to hold my values and loop my way through the marker creation like so: Code:

<script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=false"></script>
<script type="text/javascript">
  var map;
  function initialize() {
    var map_center = new google.maps.LatLng(39.2,-84.479381);
    var store_locations = new Array();
    var temporary_stuff = new Array();
    store_locations[0] = "39.112456,-84.574779";
    store_locations[1] = "39.314153,-84.261379";
    store_locations[2] = "39.197099,-84.667579";
    store_locations[3] = "39.16836,-84.479381";
    var myOptions = {
      zoom: 10,
      center: map_center,
      mapTypeId: google.maps.MapTypeId.ROADMAP
    }
    map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);
     for(i=0;i<store_locations.length;i++){
        var marker_string = "position: "+new google.maps.LatLng(store_locations[i])+", map: map, title:\"Store "+(i+1)+"\";";
        temporary_stuff[i] = new google.maps.Marker(marker_string);
    } 
    var markers = new Array();
     for(i=0;i<temporary_stuff.length;i++){
        var the_marker = "position: temporary_stuff[" + i + "], map: map, title:\"Store " + (i+1) + "\";";
        markers[i]= new google.maps.Marker(the_marker);
    } 
  }
</script>

I get a blank map. Here's a link to the test file:
http://rowsdower.freehostia.com/map_test.php

It's not throwing up any errors in Firefox's developer or in IE but there it sits, a blank map.

I'm sure this isn't clean or optimized code, but it looks correct to me. I've color-coded the code above to show what "for" loops are being used to try to replace which code. Hopefully that makes this more sensible.

I haven't even tried to add the listeners yet since I can't get the markers to appear. Can anyone tell me why this isn't working or point me in a more productive direction?

Is there a better way already out there that I haven't noticed?

Hello,

I am working on a page that has a jQuery full browser BG image and I am trying to also utilize a MooTools gallery. There seems to be some interference between the two JavaScripts as only one works (whichever one is last in order in the header of the HTML document).

Links:

http://www.courtneyhunt.com.au/press_bg.html
http://www.courtneyhunt.com.au/press_gallery.html

I am a complete novice with JavaScript so if anyone could help that would be great.

Thank you in advance.

I have some problems with intergrating google maps into my page

I cant seem to get a marker to appear on my map. I have tried numerous methods but non seem to work.

I have integrated the google maps on my main site, repositioned and re-sized.

The code below is a test page i work on to get code to work. It's just a map on a page

entire 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: 25px; padding: 25px }
#map_canvas { height: 100% }
</style>
<script type="text/javascript"
src="http://maps.googleapis.com/maps/api/js?key=AIzaSyDrxZnpYBNIwzBFVYaDY__BMONEjNEGZaI&sensor=false">
</script>
<script type="text/javascript">
function initialize() {
var myLatlng = new google.maps.LatLng(-25.363882,131.044922);
var myOptions = {
zoom: 4,
center: myLatlng,
mapTypeId: google.maps.MapTypeId.ROADMAP
}
var map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);}
var marker = new google.maps.Marker({
position: myLatlng,
map: map,
title:"Hello World!"
});

</script>
</head>

<body onload="initialize()">
<div id="map_canvas" style="width:100%; height:100%"></div>
</body>
</html>

can anybody tell my where i am going wrong and just the map appears with no marker?


thanks

I am using jMapping(http://vigetlabs.github.com/jmapping/) for using jQuery with google maps. What I'm trying to do is add an event listener so that when you click on a marker it will call a function I made within the jMapping function. Does anyone have any clues? everything I've tried doesn't work.

I'm completely at a loss how to embed a map with the new google maps api setup. I found a snippet of code that I dropped in with some small database variables pulled in and was done. Then an error came that the API was no good. So I went in and set up an anaccount, got an api and now I just simply have no clue what their instructions are saying I need to do. Gah!

Here's what I originally had:
I now have a Client ID, client secret and stuff. But no clue how to set up this url, etc.
Code:

</script> 
<script src="//maps.google.com/maps?file=api&amp;v=2&amp;key=AIzaSyD4iE2xVSpkLLOXoyqT-RuPwURN3ddScAI"
            type="text/javascript"></script>
            
<script type="text/javascript">
    
    function initialize() {
      if (GBrowserIsCompatible()) {
        var map = new GMap2(document.getElementById("map_canvas"));
        map.setCenter(new GLatLng(<?php echo $c_row['location_longitude']; ?>,<?php echo $c_row['location_latitude']; ?>), 13);
 // Add the latitude/longitude marker to the map
	var point = new GLatLng(<?php echo $c_row['location_longitude']; ?>,<?php echo $c_row['location_latitude']; ?>);
	map.addOverlay(new GMarker(point));
	map.setUIToDefault();
      }
    }

    </script>

<b>Map:<br><br><div id="map_canvas" style="width: 500px; height: 300px; z-index:4000;border-width:medium;border-color:#030;"></div></b>

Hey

I'm quite new at javascript and am currently in the process of creating a site that embeds google maps using an xml document.

What I'm trying to do is categories the markers on my map.

I am trying to make it so there are check boxes at the bottom and when i check the boxes, i.e. theatres, the markers will appear for the theatres and disappear when unchecked.

Using some example code i have modified, i have so far got the maps to pickup the markers from the xml with the check boxes but the markers are all just on the page and the check boxes dont do anything and I am stuck as to of why.

here's my code:

Code:

<!DOCTYPE HTML>
<html>
  <head>
    <title>Google Maps</title>
    <script src="mykey"></script>
  </head>
 <body style="margin:0px; padding:0px;" onload="initialize()"> 
  
    <table border=1>
      <tr>
        <td>
           <div id="map" style="width: 550px; height: 450px"></div>
        </td>
        <td valign="top" style="width:150px; text-decoration: underline; color: #4444ff;"> 
           <div id="side_bar"></div>

        </td>
      </tr>
    </table>
    <form action="#">
      Theatres: <input type="checkbox" id="theatrebox" onclick="boxclick(this,'theatre')" /> &nbsp;&nbsp;
      Golf Courses: <input type="checkbox" id="golfbox" onclick="boxclick(this,'golf')" /> &nbsp;&nbsp;
      Tourist Information: <input type="checkbox" id="infobox" onclick="boxclick(this,'info')" /><br />

    </form>  

<script type="text/javascript">
_uacct = "UA-162157-1";
urchinTracker();
</script>
  </body>


    <script type="text/javascript">
    //<![CDATA[

    if (GBrowserIsCompatible()) {

      var side_bar_html = "";
    
     
      var gmarkers = [];
	  var map = null;

      
      function createMarker(point,name,html,category) {
        var marker = new GMarker(point);
        GEvent.addListener(marker, "click", function() {
          marker.openInfoWindowHtml(html);
        });
      
		marker.mycategory = category;                                 
        marker.myname = name;
        gmarkers.push(marker);
        
        side_bar_html += '<a href="javascript<b></b>:myclick(' + (gmarkers.length-1) + ')">' + name + '<\/a><br>';
        return marker;
      }

     
 function show(category) {
        for (var i=0; i<gmarkers.length; i++) {
          if (gmarkers[i].mycategory == category) {
            gmarkers[i].setVisible(true);
          }
        }
     
        document.getElementById(category+"box").checked = true;
      }

   ensures the checkbox is cleared ==
      function hide(category) {
        for (var i=0; i<gmarkers.length; i++) {
          if (gmarkers[i].mycategory == category) {
            gmarkers[i].setVisible(false);
          }
        }
    
        document.getElementById(category+"box").checked = false;
    that we just hid
        infowindow.close();
      }


      function boxclick(box,category) {
        if (box.checked) {
          show(category);
        } else {
          hide(category);
        }
    
        makeSidebar();
      }

      function myclick(i) {
        google.maps.event.trigger(gmarkers[i],"click");
      }

     
      var map = new GMap2(document.getElementById("map"));
      map.addControl(new GLargeMapControl());
      map.addControl(new GMapTypeControl());
      map.setCenter(new GLatLng( 53.8363,-3.03771), 11);
	  
      GDownloadUrl("categories.xml", function(doc) {
        var xmlDoc = GXml.parse(doc);
        var markers = xmlDoc.documentElement.getElementsByTagName("marker");
          
        for (var i = 0; i < markers.length; i++) {
          // obtain the attribues of each marker
          var lat = parseFloat(markers[i].getAttribute("lat"));
          var lng = parseFloat(markers[i].getAttribute("lng"));
          var point = new google.maps.LatLng(lat,lng);
          var address = markers[i].getAttribute("address");
          var name = markers[i].getAttribute("name");
          var html = "<b>"+name+"<\/b><p>"+address;
          var category = markers[i].getAttribute("category");
          // create the marker
          var marker = createMarker(point,name,html,category);
          map.addOverlay(marker);
        }

        document.getElementById("side_bar").innerHTML = side_bar_html;
	
        show("theatre");
        hide("golf");
        hide("info");
      });
    }

    else {
      alert("Sorry, the Google Maps API is not compatible with this browser");
    }


    </script>
  </body>

</html>

If anybody help with this and tell me where I am going wrong, it would be much appreciated.


thanks

Hi

I have just started looking at the Google maps, and have atutorial that will get the co-ordinates. What I want this to do, is then populate two fields on a form one called longitude and one called latitude

Code:

function usePointFromPostcode(postcode, callbackFunction) {
  
  localSearch.setSearchCompleteCallback(null, 
    function() {
      
      if (localSearch.results[0]) {    
        var resultLat = localSearch.results[0].lat;
        var resultLng = localSearch.results[0].lng;
        var point = new GLatLng(resultLat,resultLng);
        callbackFunction(point);
      }else{
        alert("Postcode not found!");
      }
    });  
    
  localSearch.execute(postcode + ", UK");
}

Any ideas/tips would be be much appreciated

Hey all

I'm quite a newbie at javascript and I'm trying to have links to google maps markers.
I have a page with my embeded google maps on it and some markers.

What I'm basically looking to do is have a web page with a menu down the side and when you click the menu items, the google maps markers would pop up on the map.

For example, city attractions down a side menu and when you click say restaurants, the markers would pop up the location restaurants in a certain place, then you could click pubs and the restaurant markers would dissapear and the pub markers would appear.

Can anyboy help me with this or even direct me to some code that would help.

Thanks all.

We got a google maps with a bunch of pins. Each pin is setup to use our blue custom icon image.

I'm trying to make it so that when you click on a pin, that particular pin changes to a green version of the icon, and all the reset stay blue. If the user clicks another pin, it turns green and the previous goes back to blue.

Basicly only the clicked active pin should be green.

Code:

google.maps.event.addListener(markers[indx], 'click', function() {
    this.setIcon("/images/greenmarker.png");
});

Here is my code so far that will change the clicked pin into a green version.

My problem is all attempts to change all pins back to blue prior to changing this clicked pin to green fails bad.

Anyone know how to do this or point me in the right direction?

Hi,
I'm making a javascript with google maps API.
The concept is that you have to fill in your desired location and that it shows you the route to that location. It has an unchangeable starting location.
I also made it so that you have a description panel. Now when I try to make it so that the description panel is next to the map with the route on, my description panel just drops below my map. I believe this problem is either me f*cking up my div's or my CSS.

Here's what i used for my CSS
<style type="text/css">
html, body {
height: 100%;
margin: 0;
padding: 0;
}

#map_canvas {
height: 100%;
width: 70%
}

#directionsPanel {
float:right;
width:30%;
height 100%
}

@media print {
html, body {
height: auto;
}

#map_canvas {
height: 650px;
}
}
</style>

And here's what i used for my div's
<div id="main" style="width:100%;height:100%">
<div id="map_canvas" style="top:30px;width:70%;height:80%"></div>
<div id="warnings_panel" style="width:100%;height:10%;text-align:center"></div>
<div id="directionsPanel" style="float:right;width:30%;height 100%"></div>
</div>

Any help regarding this would be much appreciated. (And yes, I'm still new to scriptwriting/coding in general)

My google maps is showing a grey box and no map?!

Please help me, I got my code from he http://www.powerhut.co.uk/googlemaps/custom_markers.php and uploaded everything to the right place but it's just grey?!

http://79.170.40.235/affordableappli...uk/contact.php

I have a google static map which I spent ages trying to work out what to put in it and now it will not work, or be valid, so I am doing something wrong? Can anyone help Have I set it out the right way, I know it is static but it is still JS I believe.

Code:

<p><img alt="google_static_map" src="http://maps.google.com/maps/api/staticmap?center=51.454863,0.011673&zoom=13&markers=United+Reformed+Church,+111+Burnt+Ash+Road,++Lee,+London+SE12+8RG,+UK&size=250x250&sensor=TRUE /></a></p>

DO I need to put in it a div? I cant do iframes. My editor does not like it at all and it is not showing on the website. I am using XHTML