enable scroll wheel zoom in google api map

When i add map.enableScrollWheelZoom();  into my code it hides all my markers ??
All i want is to be able to zoom from scroll mouse wheel.  

Thanks
<script type="text/javascript">
 
        //<![CDATA[
 
        function load() {
            if (GBrowserIsCompatible()) {
                var map = new GMap2(document.getElementById("mapcanvas"));
                // map.addControl(new GSmallMapControl());
                map.setCenter(new GLatLng(39.953845, -86.278370), 3);
                map.addControl(new GMapTypeControl());
                map.addControl(new GLargeMapControl());
               //map.enableScrollWheelZoom();
               map.enableContinuousZoom();  
                
               // new GKeyboardHandler(map);
               // map.enableScrollWheelZoom();
                //map.enableContinuousZoom();  
                // Create our "tiny" marker icon
                var icon = new GIcon();
                icon.image = "Pushpin2.png";
                icon.shadow = "http://labs.google.com/ridefinder/images/mm_20_shadow.png";
                icon.iconSize = new GSize(16, 26);
                icon.shadowSize = new GSize(22, 20);
                icon.iconAnchor = new GPoint(6, 20);
                icon.infoWindowAnchor = new GPoint(5, 1);
 
                function createMarker(point, i, html, exist, addr1, addr2, name, city, state, zip, phone, contact, addr) {
                    addr = escape(addr);
                    addr2 = escape(addr2);
                   // name = escape(name);
                    city = escape(city);
                    state = escape(state);
 
                    var marker;
                    if (exist) marker = new GMarker(point, icon);
                    else marker = new GMarker(point);
                    GEvent.addListener(
            marker, "click", function() { marker.openInfoWindowHtml('<span class=titleboldorange>' + name + '</span><br>' + '<b>Contact:</b> ' + contact + '<br>' + '<b>Address:</b> ' + addr1 + '<br>' + '<b>City:</b> ' + city + '<br>' + '<b>State:</b> ' + state + '<br>' + '<b>Zip:</b> ' + zip + '<br>' + '<b>Phone:</b> ' + phone + '<br>' + '<a target=_blank href=http://maps.google.com/maps?q=' + addr + '>Directions</a>'); }
          );
                    return marker;
                }
 
//                function createMarker(point, i, html, exist, addr1, addr2, name, city, state, zip, phone,contact) {
//                    var marker;
//                    if (exist) marker = new GMarker(point, icon);
//                    else marker = new GMarker(point);
//                    GEvent.addListener(
//            marker, "click", function() { marker.openInfoWindowHtml('<H2>' + name + '</H2>' + '<b>Contact:</b> ' + contact + '<br>' + '<b>Address:</b> ' + addr1 + '<br>' + '<b>City:</b> ' + city + '<br>' + '<b>State:</b> ' + state + '<br>' + '<b>Zip:</b> ' + zip + '<br>' + '<b>Phone:</b> ' + phone + '<br>' + '<a target=_blank href=http://maps.google.com/maps?q=' + addr1 + '>Directions</a>'); }
//          );
//                    return marker;
//                }
 
            
                GDownloadUrl("xml.aspx", function(data) {
                    var xml = GXml.parse(data);
                    var markers = xml.documentElement.getElementsByTagName("marker");
                    for (var i = 0; i < markers.length; i++) {
                        var point = new GLatLng(parseFloat(markers[i].getAttribute("lat")),
                                    parseFloat(markers[i].getAttribute("lng")));
                        var html = markers[i].getAttribute("label");
                        var name = markers[i].getAttribute("name");
                        var exist = markers[i].getAttribute("exist");
                        var addr = markers[i].getAttribute("addr1") +' ,'+ markers[i].getAttribute("city")+' '+ markers[i].getAttribute("state");
                        var addr1 = markers[i].getAttribute("addr1");
                        var addr2 = markers[i].getAttribute("addr2");
                        var city = markers[i].getAttribute("city");
                        var state = markers[i].getAttribute("state");
                        var zip = markers[i].getAttribute("zip");
                        var contact = markers[i].getAttribute("contact");
                        var phone = markers[i].getAttribute("phone");
                        map.addOverlay(createMarker(point, i, html, exist,addr1,addr2,name,city,state,zip,phone,contact,addr));
                    }
                }
            );
            }
        }
 
        //]]>
    </script>

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gianitooAsked:
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gianitooAuthor Commented:
still dont know what to add
0
dosthCommented:
thanks for the points
0
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