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;
	if (document.getElementById("map_address")) {
		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);
}