Javascript 在openlayers代码中的何处添加可见性：false？

我想知道在下面的代码中在哪里可以添加可见性：false： 就像第二个代码一样

var line_10 = new OpenLayers.Layer.GML("Line nr-10", 
    "lines/line_10.kml",
    {
        format: OpenLayers.Format.KML,
        style: {strokeWidth: 4, strokeColor: "#f08080", fillOpacity: 1 },
        projection: map.displayProjection
    }
);

第二个代码：

var linja4_2 = new OpenLayers.Layer.Vector("Line nr-4 stations", {
    projection: map.displayProjection,
    strategies: [new OpenLayers.Strategy.Fixed()],
    protocol: new OpenLayers.Protocol.HTTP({
        url: "/data/linja-nr4.kml",
        format: new OpenLayers.Format.KML({
            extractStyles: true,
            extractAttributes: true
        })
    }),
    visibility: false
});

---

如果我没记错的话，我会把

可见性

放在这里：

var line_10 = new OpenLayers.Layer.GML("Line nr-10", 
    "lines/line_10.kml",
    {
        format: OpenLayers.Format.KML,
        style: {strokeWidth: 4, strokeColor: "#f08080", fillOpacity: 1 },
        projection: map.displayProjection
    }, {
        visibility: false
    }
);

或如评论中所建议的：

var line_10 = new OpenLayers.Layer.GML("Line nr-10", 
    "lines/line_10.kml",
    {
        format: OpenLayers.Format.KML,
        style: {strokeWidth: 4, strokeColor: "#f08080", fillOpacity: 1 },
        projection: map.displayProjection
    }
);
line_10.setVisibility(false);

---

如果我没记错的话，我会把

可见性

放在这里：

var line_10 = new OpenLayers.Layer.GML("Line nr-10", 
    "lines/line_10.kml",
    {
        format: OpenLayers.Format.KML,
        style: {strokeWidth: 4, strokeColor: "#f08080", fillOpacity: 1 },
        projection: map.displayProjection
    }, {
        visibility: false
    }
);

或如评论中所建议的：

var line_10 = new OpenLayers.Layer.GML("Line nr-10", 
    "lines/line_10.kml",
    {
        format: OpenLayers.Format.KML,
        style: {strokeWidth: 4, strokeColor: "#f08080", fillOpacity: 1 },
        projection: map.displayProjection
    }
);
line_10.setVisibility(false);

---

尝试在GML上使用

setVisibility（）

。对不起，我不知道该放在哪一行！？在变量行_10的声明后面的代码之外。我不能在这里测试它，但我想这应该是可行的：

line_10.setVisibility（false）尝试在GML上使用
setVisibility（）
。对不起，我不知道该放在哪一行！？在变量行_10的声明后面的代码之外。我不能在这里测试它，但我想这应该是可行的：
line_10.setVisibility（false）