OpenLayers Add Marker addPOI,添加标注

+  this.addPOI = function(listpoi) {
+  
+  	for(var i=0; i<listpoi.length; ++i) {
+  		
+  		var pointWKT = listpoi[i][0];
+  		var title = listpoi[i][1];
+  		var url = listpoi[i][2];
+  		var description = listpoi[i][3];
+  		
+	  	var mywkt = new OpenLayers.Format.WKT();
+		feature = mywkt.read(pointWKT)
+	    lon = feature.geometry.x
+	    lat = feature.geometry.y
+	  
+	    ll = new OpenLayers.Layer.SphericalMercator.forwardMercator(lon, lat);
+	    
+	    popupClass = OpenLayers.Class(OpenLayers.Popup.FramedCloud, { 'autoSize': false });
+	    
+	  	var feature = new OpenLayers.Feature(this.msWMS, ll); 
+		feature.closeBox = true;
+		feature.popupClass = popupClass;
+		feature.data.popupContentHTML = "<div
style='background-color:white;width:200;height:200'><a href='" + url + "' target='_blank'>" +
title + "</a><br />" + description + "</div>";
+	    feature.data.overflow = "auto";
+	    
+	    var size = new OpenLayers.Size(7,7);
+	    var offset = new OpenLayers.Pixel(-(size.w/2), -size.h);
+	    var icon = new OpenLayers.Icon('poi.gif',size,offset);
+	    
+		feature.data.icon = icon;
+		        
+		var marker = feature.createMarker();
+		
+		var markerClick = function (evt) {
+		    if (this.popup == null) {
+		        this.popup = this.createPopup(this.closeBox);
+		        OLWidget.map.addPopup(this.popup);
+		        this.popup.show();
+		    } else {
+		        this.popup.toggle();
+		    }
+		    currentPopup = this.popup;
+		    OpenLayers.Event.stop(evt);
+		};
+		marker.events.register("mousedown", feature, markerClick);
+		
+		this.markers.addMarker(marker);
+	}
+  }
+}