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

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

function google_load_map() {
  if( GBrowserIsCompatible()) {
    var map = new GMap2( document.getElementById( "map" ));
    map.addControl(new GSmallMapControl());
    map.addControl(new GMapTypeControl());
	// Merchant House, John Street
    map.setCenter( new GLatLng( 53.730800, -2.662175 ), 17 );

    // Our info window content
    var info = "<b>BD-i Design</b><br>Merchant House<br> 1 John Street<br> Bamber Bridge<br> Preston<br> Lancashire<br> England<br>PR5 6TJ<br>01772 620772<br><a href='http://www.bd-i.co.uk'>BD-i Design</a>";

    // Place a marker in the center of the map and open the info window
    // automatically
    var marker = new GMarker( map.getCenter());
    GEvent.addListener(marker, "click", function() {
      marker.openInfoWindowHtml( info );
    });
    map.addOverlay( marker );
    marker.openInfoWindowHtml( info );
  }
}