var map;
var markersArray = [];

function init_gmap(lat, lng) {
  var myLatlng = new google.maps.LatLng((lat!=null ? lat : 47.47),(lng!=null ? lng : 19.2));
  var myOptions = {
    zoom: 7,
    center: myLatlng,
    mapTypeId: google.maps.MapTypeId.ROADMAP
  }
  map = new google.maps.Map(document.getElementById("gmap_canvas"), myOptions);
}
  
function placeMarker(location){
  clearOverlays();
  deleteOverlays();
  addMarker(location);
  map.setCenter(location);
  //map.setZoom(14);
}
function addMarker(location){
  marker = new google.maps.Marker({
    position: location,
    draggable: true,
    animation: google.maps.Animation.DROP,
    map: map
  });
  google.maps.event.addListener(marker, 'dragend', markerDrop);
  markersArray.push(marker);
}

function showOverlays(){
  if (markersArray){
    for (i in markersArray){
      markersArray[i].setMap(map);
    }
  }
}
function clearOverlays(){
  if (markersArray) {
    for (i in markersArray) {
      markersArray[i].setMap(null);
    }
  }
}
function deleteOverlays() {
  if (markersArray) {
    for (i in markersArray) {
      markersArray[i].setMap(null);
    }
    markersArray.length = 0;
  }
}

function addMarkerByLatLon(lat, lon, id, title, address, tel, email){
  marker = new google.maps.Marker({
    position: new google.maps.LatLng(lat,lon),
    draggable: false,
    //animation: google.maps.Animation.DROP,
    map: map,
    title: title + "\n" + address + "\n" + tel + "\n" + email
  });
  google.maps.event.addListener(marker, "click", function() {
    //openInfoWindowHtml("<b>" + title + "</b><br />" + address + "<br /><br />" + text);
        openPartner(id);
  });
  //google.maps.event.addListener(marker, 'dragend', markerDrop);
  markersArray.push(marker);
}