function 图层选择(sizelayername)	
    {
 
        var d = new ActionDescriptor();
        var r = new ActionReference();
        r.putName(stringIDToTypeID("layer"), sizelayername);
        d.putReference(stringIDToTypeID("null"), r);
        d.putBoolean(stringIDToTypeID("makeVisible"), false);
        var list = new ActionList();
        list.putInteger(10);
        d.putList(stringIDToTypeID("layerID"), list);
        executeAction(stringIDToTypeID("select"), d, DialogModes.NO);
  
    }