You need a PositionOptions object, in which you set the high accuracy flag following the API.

I am quoting from here: http://diveintohtml5.info/geolocation.html

The getCurrentPosition() function has an optional third argument, a
PositionOptions object. There are three properties you can set in a
PositionOptions object. All the properties are optional. You can set
any or all or none of them.

POSITIONOPTIONS OBJECT



Property            Type        Default         Notes

--------------------------------------------------------------

enableHighAccuracy  Boolean     false           true might be slower

timeout             long        (no default)    in milliseconds

maximumAge          long        0               in milliseconds

So, it should work like this:

if (navigator.geolocation) {

    navigator.geolocation.getCurrentPosition(function(position) {

        var latitude = position.coords.latitude;

        var longitude = position.coords.longitude;

        var accuracy = position.coords.accuracy;

        var coords = new google.maps.LatLng(latitude, longitude);

        var mapOptions = {

            zoom: 15,

            center: coords,

            mapTypeControl: true,

            navigationControlOptions: {

                style: google.maps.NavigationControlStyle.SMALL

            },

            mapTypeId: google.maps.MapTypeId.ROADMAP

        };



        var capa = document.getElementById(capa);

        capa.innerHTML = latitude:  + latitude + , longitude:  + , accuracy:  + accuracy;



        map = new google.maps.Map(document.getElementById(mapContainer), mapOptions);

        var marker = new google.maps.Marker({

            position: coords,

            map: map,

            title: ok

        });



    },

    function error(msg) {alert('Please enable your GPS position feature.');},

    {maximumAge:10000, timeout:5000, enableHighAccuracy: true});

} else {

    alert(Geolocation API is not supported in your browser.);

}

Noticed I added the following 2 parameters to getCurrentPosition call:

1. function error(msg){alert('Please enable your GPS position future.');}

   
   
   

   This function is called when GPS could not be retrieved or the timeout has been triggered.




2. {maximumAge:10000, timeout:5000, enableHighAccuracy: true});

   
   
   

   These are the options. We don't want gps data that is older than 10 seconds (maximumAge:10000). We don't want to wait longer than 5 seconds for a response (timeout:5000) and we want to enable high accuracy (enableHighAccuracy: true).

Also see: Geolocation HTML5 enableHighAccuracy True , False or Best Option?