function loadMap()
{
    if (GBrowserIsCompatible())
    {
        var map = new GMap2(document.getElementById('gmap1'));
        map.addControl(new GLargeMapControl());
        map.addControl(new GOverviewMapControl());
        
        var center = new GLatLng(53.055630, -2.215230);
        map.setCenter(center, 15);
        var marker = new GMarker(center);
        map.addOverlay(marker);
        map.openInfoWindowHtml(center, "<center><b>JOHNSON TILES</b><BR>Harewood Street, Tunstall, <BR>Stoke-on-Trent, ST6 5JZ</center>");
    }
}

window.onload = loadMap;
window.onunload = GUnload;