function createMarker(point,html) {
        var marker = new GMarker(point);
        GEvent.addListener(marker, "click", function() {
          marker.openInfoWindowHtml(html);
        });
        return marker;
      }



function initialize() {
      if (GBrowserIsCompatible()) {
        var map = new GMap2(document.getElementById("mapa"));
        var mapTypeControl = new GMapTypeControl();
var topRight = new GControlPosition(G_ANCHOR_TOP_RIGHT, new GSize(10,10));
var bottomRight = new GControlPosition(G_ANCHOR_BOTTOM_RIGHT, new GSize(10,10));
map.addControl(mapTypeControl, topRight);
GEvent.addListener(map, "dblclick", function() {
  map.removeControl(mapTypeControl);
  map.addControl(new GMapTypeControl(), bottomRight);
});
map.addControl(new GSmallMapControl());
map.setCenter(new GLatLng(39.54821, -0.46089), 13);

     var point = new GLatLng(39.54821, -0.46089);
      var marker = createMarker(point,'<div style="width:240px">Parque Tecnologico de Valencia<br/>Av. Benjamin Franklin 12, 46980 Paterna<br/>961 994 200<br/><a href="http://www.aftsl.com">www.aftsl.com‎<\/a><\/div>')
      map.addOverlay(marker);

      }
    }// JavaScript Document