function initMap() {
    var uluru = {lat: 39.051660, lng: -94.591354};
    var map = new google.maps.Map(document.getElementById('map'), {
        zoom: 12,
        center: uluru
    });
    var marker = new google.maps.Marker({
        position: uluru,
        map: map
    });
    var window = new google.maps.InfoWindow({
        content: '<form action=\"http://maps.google.com/maps\" method=\"get\" class=\"infoWindow\"><label>your zip</label><input type=\"text\" name=\"saddr\" id=\"saddr\" class=\"input_small\" />&nbsp;<input type=\"submit\" value=\"Go!\" /><input type=\"hidden\" name=\"daddr\" value=\"39.051660,-94.591354\" /><input type=\"hidden\" name=\"hl\" value=\"en\" /></p></form>'
    });
    google.maps.event.addListener(marker, 'click', function() {
        window.open(map, marker);
    });
}