通过使用变量而不是图层名称本身来更改图层的可见性 [英] Change the visibility of layer by using variable instead of layer's name itself

问题描述

这是我的选择选项。

<select id="sel_dist" onChange="seldist();">
    <option value="layer1" selected=selected>None</option>
    <option value="layer2">1</option>
    <option value="layer3">2</option>
</select>

这是我在Openlayers中的图层

This is my layer in Openlayers

layer1 =  new OpenLayers.Layer.WMS("Map",serverWMS,
                                        {layers: 'test:Layer1',transparent: true},
                                        {isBaseLayer:false, visibility: false});

我想要做的是当我选择Layer 1选项时，图层1应该是可见的。

What i want to do is when i select option "Layer 1", layer 1 should be visible.

function seldist()
{
var layer_name=$("#sel_dist option:selected").val()
layer_name.setVisibility(true);
}

但是当我使用 layer_name.setVisibility 它假定'layer_name'作为图层名称，但我只想将它用作变量。任何帮助将不胜感激。

But when i use layer_name.setVisibilityit assumes 'layer_name' as layer name but i want to use it as variable only. Any help would be much appreciated.

推荐答案

编辑：

eval(layer_name).setVisibility(true);

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