Collapse single group of layers

[milevic]

Is it possible to collapse only currently selected group of layers in PS using javascript?
I have the problem that after completing my script, selected group stay expanded, even it is collapsed when i run script.
I found some solutions where all groups are collapsed,  but is possible to do it for a single group?

Thanks in advance

[microbians]

Is there a way not to change the group to open or close state, but to know is the group is open or closed?

[r-bin · Accepted solution]

var id = activeDocument.activeLayer.id;

var r = new ActionReference();    
r.putProperty(stringIDToTypeID("property"), stringIDToTypeID("layerSectionExpanded"));
r.putIdentifier(stringIDToTypeID("layer"), id);

var rez = executeActionGet(r).getBoolean(stringIDToTypeID("layerSectionExpanded"));

alert(rez?"Expanded":"Collapsed");

[Stephen Marsh]

@r-bin – You always impress!