openlayers 渲染wkt数据，标记中心值并弹窗

function drawFatureSelectRow(vwkt,vl,name,phone,address){
var feature = new OpenLayers.Format.WKT().read(vwkt);
var gml = new OpenLayers.Format.GML();
var style = {
strokeColor: "blue",
strokeWidth: 1,
pointerEvents: "visiblePainted",
fillColor: "red",
fillOpacity: 0.5
};
feature.style=style;
var geo = feature.geometry;
/* <span style="color:#ff0000;">var bo = geo.getBounds();
var latlon=bo.getCenterLonLat()</span>; 可以获得中心点，但如果是不规则线面状数据，中心点会偏移到不在图象上*/
var vlistv=geo.getVertices();
var latlon;
if(vlistv.length>1){
var vmid;
if(vlistv.length%2==0){
vmid=vlistv.length/2
}else{
vmid=(vlistv.length+1)/2;
}

alert(vmid);
latlon=vlistv[vmid];
}else{
latlon= geo.getVertices()[0];
}

var lat = latlon.y;
var lon = latlon.x;

vectorLayer.addFeatures([feature]);
locatebylonlatSelectRow(lon,lat,name,phone,address);
map.moveTo([lon, lat], vl, new Object());

}

function locatebylonlatSelectRow(lon,lat,name,phone,address){
var AutoSizeFramedCloud = OpenLayers.Class(OpenLayers.Popup.FramedCloud, {
'autoSize': true,
'maxSize': new OpenLayers.Size(280, 270)
});
var feature = new OpenLayers.Format.WKT().read("POINT(" + lon + " " + lat + ")");
var point = feature.geometry.getCentroid();
var lonlat = new OpenLayers.LonLat(point.x, point.y);
var popupClass = AutoSizeFramedCloud;
var popupContentHTML = "<label>名称： </label>" + name + "<br/>" + "<label>电话： </label>" + phone+ "<label>地址： </label>" + address;
if(address==="rode"){
popupContentHTML= "<label>名称： </label>" + name ;
}
addMarkerForLocate(lonlat, popupClass, popupContentHTML, true, true);
}

//弹窗
function addMarkerForLocate(ll, popupClass, popupContentHTML, closeBox, overflow) {

var feature = new OpenLayers.Feature(markerLayer, ll);
feature.closeBox = closeBox;
feature.popupClass = popupClass;
feature.data.popupContentHTML = popupContentHTML;
feature.data.overflow = (overflow) ? "auto" : "hidden";

var marker = feature.createMarker();

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);

markerLayer.addMarker(marker);
}