//點選一個標註按鈕的事件,該方法的作用就是啟用新增標註事件
var map_onclick;
function enable_click()
{
    map_onclick = new OpenLayers.Control.Click();   
    map.addControl(map_onclick);   
    map_onclick.activate();
}


//註冊新增新增標註Handler
//註冊新增標註Event
OpenLayers.Control.Click = OpenLayers.Class(OpenLayers.Control, {               
                defaultHandlerOptions:
                {
                    'single': true,
                    'double': false,
                    'pixelTolerance': 0,
                    'stopSingle': false,
                    'stopDouble': false
                },

                initialize: function(options)
                {
                    this.handlerOptions = OpenLayers.Util.extend({}, this.defaultHandlerOptions);
                    OpenLayers.Control.prototype.initialize.apply(this, arguments);
                    this.handler = new OpenLayers.Handler.Click(this, {'click': this.trigger}, this.handlerOptions);
                },

                trigger: function(e)
                {                   
                    var lonlat = this.map.getLonLatFromPixel(e.xy);//map.getLonLatFromViewPortPx(e.xy);     
                    removeAll();
                    createMarker("<a href='

http://www.handandaily.com' target='_blank'>Visit China</a>",lonlat.lon,lonlat.lat,false);                                       
                }
    });



function createMarker(html,lon,lat,isHide)
{    
    var ll, popupClass, popupContentHTML;
    ll = new OpenLayers.LonLat(lon,lat);
    popupClass = AutoSizeFramedCloud;
    popupContentHTML = html;
    addMarker(ll, popupClass, popupContentHTML, true, false);
    setCenter(lon,lat);
}



function addMarker(ll, popupClass, html, closeBox, overflow)
{   
    var feature = new OpenLayers.Feature(markers, ll);
    feature.closeBox = closeBox;
    feature.popupClass = popupClass;
    feature.data.popupContentHTML = html;
    feature.data.overflow = (overflow) ? "auto" : "hidden";
                       
    var marker = feature.createMarker();
    marker.setUrl('img/marker1.png');   //ICON
    marker.display(true);  
   
    var markerClick = function (evt)
    {       
        if (this.popup == null)
        {        
            this.popup = this.createPopup(this.closeBox);
            map.addPopup(this.popup);
            this.popup.show();
        }
        else
        {
            this.popup.toggle();
        }
        currentPopup = this.popup;
        OpenLayers.Event.stop(evt);
    }; 
    marker.events.register("mousedown", feature, markerClick);
    markers.addMarker(marker);
}