function wheelevent(e) {
	if (!e)
		e = window.event
	if (e.preventDefault)
		e.preventDefault()
		
	e.returnValue = false;
}

function initialize() {
	var map = null;
    var geocoder = null;
    var startzoom = 14; 
	
	if (!GBrowserIsCompatible()) return;
	var address = document.getElementById("map_address").value;
	var addresshtml = document.getElementById("map_addresshtml").value;
	var map = new GMap2(document.getElementById("map_canvas"));
	geocoder = new GClientGeocoder();
    // add controls
	showAddress(address, startzoom);
	
    function showAddress(address, zoomvalue) {
        geocoder.getLatLng(
			address,
			function(point) {
				if (!point) {
					alert(address + " nicht gefunden");
				} else {
					map.setCenter(point, zoomvalue);
					var marker=new GMarker(point);
					GEvent.addListener(marker, "click", function() {
						marker.openInfoWindowHtml(addresshtml);
					});

					map.addOverlay(marker);
					
					map.addControl(new GSmallMapControl());
					map.addControl(new GMapTypeControl());
					
					map.enableScrollWheelZoom();
					GEvent.addDomListener(map.getContainer(), "DOMMouseScroll", wheelevent);
					map.getContainer().onmousewheel = wheelevent;
				}
			}
		);
	}
	
	//marker.openInfoWindowHtml(address);
}