OpenLayers在选择功能图像时发送GET请求，降低性能

我的代码工作得非常好，除了每次我单击/悬停在“标记”上时，openLayer都会尝试从本地服务器检索一些图像（.png）。这是我的代码，图像不是直接指定的。我不确定要覆盖什么以禁止此行为：

这是我得到的错误“onSelect”：

这是我的密码。我希望有人能帮上忙，因为重复的GET请求扼杀了性能

var lonlat = convertProjectionToSphere(location);
    console.log(lonlat);
    var pointFeatures = [];

    var pointGeometry = new OpenLayers.Geometry.Point(lonlat.lon, lonlat.lat);
    var pointFeature = new OpenLayers.Feature.Vector(
        pointGeometry,
        null,
        {
            pointRadius: 16,
            fillOpacity: 0.7,
            externalGraphic:'img/mapIcons/Multi-Wave-test.png'
        });
    pointFeatures.push(pointFeature);

    // Add features to the layer
    var pointLayer = map.getLayer('Vectors');
    pointLayer.addFeatures(pointFeatures);

    // Add select feature control required to trigger events on the vector layer.
    var selectControl = new OpenLayers.Control.SelectFeature(pointLayer, {
        hover: true,
        onSelect: function(feature) { // last point in my code from the stack trace
            var layer = feature.layer;
            feature.style.fillOpacity = 1;
            feature.style.pointRadius = 20;
            //layer.drawFeature(feature);
            var content =   '<div style="background-color:white;"><strong>Feature:</strong>'+
                            '<br/>' + feature.id +
                            '<br/><br/><strong>Location:</strong>'+
                            '<br/>' + feature.geometry +'</div>';
            var popup = new OpenLayers.Popup.FramedCloud(
                            feature.id+"_popup",
                            feature.geometry.getBounds().
                            getCenterLonLat(),
                            new OpenLayers.Size(250, 100),
                            content,
                            null,   // anchor
                            true,   // closeBox exists
                            null); //closeBoxCallback
            feature.popup = popup;
            map.addPopup(popup);
        },
        onUnselect: function(feature) {
            var layer = feature.layer;
            feature.style.fillOpacity = 1;
            feature.style.pointRadius = 16;
            feature.renderIntent = null;
            layer.drawFeature(feature);
            map.removePopup(feature.popup);
        }
    });
    map.addControl(selectControl);
    selectControl.activate();

var lonlat=convertProjectionSphere（位置）；
控制台日志（lonlat）；
var pointFeatures=[]；
var pointGeometry=newopenlayers.Geometry.Point（lonlat.lon，lonlat.lat）；
var pointFeature=new OpenLayers.Feature.Vector(
点几何，
无效的
{
点半径：16，
不透明度：0.7，
外部图形：“img/mapIcons/Multi-Wave test.png”
});
pointFeatures.push（pointFeature）；
//向图层添加要素
var pointLayer=map.getLayer（'Vectors'）；
pointLayer.addFeatures（pointFeatures）；
//添加触发向量层上的事件所需的选择要素控件。
var selectControl=new OpenLayers.Control.SelectFeature（pointLayer{
哈弗：没错，
onSelect:function（feature）{//堆栈跟踪代码中的最后一点
var层=feature.layer；
feature.style.fillOpacity=1；
feature.style.pointRadius=20；
//图层特征（特征）；
var content='功能：'+
“
”+feature.id+
“

位置：”+
“
”+feature.geometry+”；
var popup=new OpenLayers.popup.FramedCloud(
feature.id+“\u弹出窗口”，
feature.geometry.getBounds（）。
getCenterLonLat（），
新OpenLayers.尺寸（250100），
内容,，
null，//锚点
true，//closeBox存在
null）；//closeBoxCallback
feature.popup=弹出窗口；
map.addPopup（弹出窗口）；
},
ONONSELECT：功能（特性）{
var层=feature.layer；
feature.style.fillOpacity=1；
feature.style.pointRadius=16；
feature.renderInt=null；
图层特征（特征）；
map.removeppopup（feature.popup）；
}
});
map.addControl（selectControl）；
选择control.activate（）；

您正在使用“”弹出窗口。OpenLayers要加载的图像是该弹出窗口的边界。图像包含在OpenLayers发行版附带的“img”文件夹中。 您可以通过OpenLayers.ImgPath更改图像文件夹的路径。这是一本书。 或者，您可以使用更简单的弹出式样式，如“锚定”。我认为它不使用图像作为框架

var lonlat = convertProjectionToSphere(location);
    console.log(lonlat);
    var pointFeatures = [];

    var pointGeometry = new OpenLayers.Geometry.Point(lonlat.lon, lonlat.lat);
    var pointFeature = new OpenLayers.Feature.Vector(
        pointGeometry,
        null,
        {
            pointRadius: 16,
            fillOpacity: 0.7,
            externalGraphic:'img/mapIcons/Multi-Wave-test.png'
        });
    pointFeatures.push(pointFeature);

    // Add features to the layer
    var pointLayer = map.getLayer('Vectors');
    pointLayer.addFeatures(pointFeatures);

    // Add select feature control required to trigger events on the vector layer.
    var selectControl = new OpenLayers.Control.SelectFeature(pointLayer, {
        hover: true,
        onSelect: function(feature) { // last point in my code from the stack trace
            var layer = feature.layer;
            feature.style.fillOpacity = 1;
            feature.style.pointRadius = 20;
            //layer.drawFeature(feature);
            var content =   '<div style="background-color:white;"><strong>Feature:</strong>'+
                            '<br/>' + feature.id +
                            '<br/><br/><strong>Location:</strong>'+
                            '<br/>' + feature.geometry +'</div>';
            var popup = new OpenLayers.Popup.FramedCloud(
                            feature.id+"_popup",
                            feature.geometry.getBounds().
                            getCenterLonLat(),
                            new OpenLayers.Size(250, 100),
                            content,
                            null,   // anchor
                            true,   // closeBox exists
                            null); //closeBoxCallback
            feature.popup = popup;
            map.addPopup(popup);
        },
        onUnselect: function(feature) {
            var layer = feature.layer;
            feature.style.fillOpacity = 1;
            feature.style.pointRadius = 16;
            feature.renderIntent = null;
            layer.drawFeature(feature);
            map.removePopup(feature.popup);
        }
    });
    map.addControl(selectControl);
    selectControl.activate();