var map;

function placeMarkerAtPoint(lat,lng){
 var marker = new GLatLng(lat,lng);
 map.addOverlay(createMarker(marker));
}

function createMarker(point,project_id,project_name,project_intro) {
  var baseIcon = new GIcon();
  baseIcon.shadow = "_img/_markers/shadow.png";
  baseIcon.iconSize = new GSize(26, 45);
  baseIcon.shadowSize = new GSize(45, 45);
  baseIcon.iconAnchor = new GPoint(26, 45);
  baseIcon.infoWindowAnchor = new GPoint(9, 2);
  var icon = new GIcon(baseIcon);
  icon.image = "_img/_markers/marker.png";
  var marker = new GMarker(point,icon);
  GEvent.addListener(marker, "click", function() {
  marker.openInfoWindowHtml("hello!");
  });
 return marker;
}

function mapLoad() {
 if (GBrowserIsCompatible()) {
  map = new GMap2(document.getElementById("contactMap"));
  map.addControl(new GSmallMapControl());
  map.enableScrollWheelZoom();
  map.enableDoubleClickZoom();
  map.addControl(new GMapTypeControl());
  map.setCenter(new GLatLng(50.697803,-3.515797), 13);

  placeMarkerAtPoint(50.697803,-3.515797);

 }
}

function mapJump(lat,lng,map_zoom) {
 map.setCenter(new GLatLng(lat,lng),map_zoom);
}

function addLoadEvent(func) {
 var oldonload = window.onload;
 if (typeof window.onload != 'function') {
  window.onload = func;
 } else {
  window.onload = function() {
  oldonload();
  func();
  }
 }
}

function addUnLoadEvent(func) {
 var oldonunload = window.onunload;
 if (typeof window.onunload != 'function') {
  window.onunload = func;
 } else {
  window.onunload = function() {
  oldonunload();
  func();
  }
 }
}

addLoadEvent(mapLoad);