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

      function initialize() {
        if(document.getElementById('map_canvas') != null){
          if (GBrowserIsCompatible()) {
              var text = '<B>International Business Center</B><BR>Pobřežní 3<BR>186 00 Praha 8<BR>Česká republika'
              var map = new GMap2(document.getElementById('map_canvas'));
              map.setCenter(new GLatLng(50.092622, 14.441209), 14);
              map.setUIToDefault();
              var marker = createMarker(map, text);
              map.addOverlay(marker);
              marker.openInfoWindowHtml(text);
          }
        }
      }

      function showhide(nm){
        if(document.getElementById(nm).style.display == 'none'){
          document.getElementById(nm).style.display = 'block';
        } else {
          document.getElementById(nm).style.display = 'none';
        }
      }