move layermask from a layerSet to another one

This moves a layer mask from the current layer to a layer with the name 'Layer 1'

function ftn1() {
  function cTID(s) { return app.charIDToTypeID(s); };
  function sTID(s) { return app.stringIDToTypeID(s); };
    var desc8 = new ActionDescriptor();
    desc8.putClass( cTID('Nw  '), cTID('Chnl') );
        var ref5 = new ActionReference();
        ref5.putEnumerated( cTID('Chnl'), cTID('Chnl'), cTID('Msk ') );
        ref5.putName( cTID('Lyr '), "Layer 1" );
    desc8.putReference( cTID('At  '), ref5 );
        var ref6 = new ActionReference();
        ref6.putEnumerated( cTID('Chnl'), cTID('Chnl'), cTID('Msk ') );
        ref6.putEnumerated( cTID('Lyr '), cTID('Ordn'), cTID('Trgt') );
    desc8.putReference( cTID('Usng'), ref6 );
    executeAction( cTID('Mk  '), desc8, DialogModes.NO );
};

This makes a selection from the mask of the current layer:

function ftn2() {
  function cTID(s) { return app.charIDToTypeID(s); };
  function sTID(s) { return app.stringIDToTypeID(s); };
    var desc15 = new ActionDescriptor();
        var ref11 = new ActionReference();
        ref11.putProperty( cTID('Chnl'), cTID('fsel') );
    desc15.putReference( cTID('null'), ref11 );
        var ref12 = new ActionReference();
        ref12.putEnumerated( cTID('Chnl'), cTID('Chnl'), cTID('Msk ') );
    desc15.putReference( cTID('T   '), ref12 );
    executeAction( cTID('setd'), desc15, DialogModes.NO );
};

This and more can be discovered via the Script Listener plugin.