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

function load() {
    if (GBrowserIsCompatible()) {
        var map = new GMap2(document.getElementById("map"));
        map.addControl(new GSmallMapControl());
        map.addControl(new GMapTypeControl());
        var marker = new GMarker(new GLatLng(50.74179189527678, -0.7656741142272949)); 
        map.setCenter(new GLatLng(50.739714, -0.779943), 13);
        map.addOverlay(marker);
    }
}

addLoadEvent(load);