map.js

function initialize() {
    geocoder = new google.maps.Geocoder();
    alert(geocoder.latitude);
    alert(geocoder.longitude);
    var latlng = new google.maps.LatLng(-22.618827234831404, -42.57636812499999);
    var mapOptions = {
        zoom: 8,
        center: latlng
    }
    map = new google.maps.Map(document.getElementById('map-canvas'), mapOptions);
}

function goToAddress() {
    var address = document.getElementById('address').preventDefault();
    geocoder.geocode( { 'address': address}, function(results, status) {
        if (status == google.maps.GeocoderStatus.OK) {
           var marker = map.setCenter(results[0].geometry.location);
            new google.maps.Marker({
                map: map,
                position: results[0].geometry.location,
                icon:"/img/icon.png"
            });
        } else {
            alert('Geocode was not successful for the following reason: ' + status);
        }
    });
}

google.maps.event.addDomListener(window, 'load', initialize);