var f = new SuperMap.Feature.Vector();
f.geometry = new SuperMap.Geometry.Point(wst[i].xz_LON, wst[i].xz_LAT);
f.style = {
graphic: true,
externalGraphic: "./img/zd"+level+".png",
graphicWidth: 13,
graphicHeight:13,
fontWeight:"bold",
label:wst[i].xz_NAME,
fontColor:"gray"
// fontSize:14
};