Show mask action/script

Question

I am trying to create an action or a script that will allow me to reveal a layer mask with a keyboard shortcut.
Normally, in PS CC 2014 I select the layer mask in the layers palette, then hold option and click on the mask icon.
This sequence reveals the layer mask in BW.
I am having trouble recording an action which selects an existing layer mask and then reveals the mask.
The action recording stops after I select the layer mask.
Additionally, I try making a script with the code generated with the script listener plugin. But this also does not work.
Any ideas how to make an action or script that shows the layer mask? 

Answer 1

Trying to take the code one step further by creating a script to toggle the layer mask visibility.
I am able to call the showMask hideMask functions individually but not toggle the mask visibility yet.
Is the if statement the right way to proceed to create the toggle effect?
I am unclear how to target the mask element in a layer with javascript.
if the mask is not visible
showMask();
else if the mask is visible
maskHide();
#target photoshop
//Make Photoshop the formost Appplication
app.bringToFront();
//Test for open document
if(app.documents.length > 0){
        //Select mask layer
        var docRef = app.activeDocument;
        var layerRef=docRef.layers.getByName("255 fill"); //"Layer Name"  
        docRef.activeLayer=layerRef;
        // call showMask function
        //showMask ();
        // call hideMask function
        //hideMask ();
        //toggle mask visbility            
else {
    alert("No documents are open");
// FUNCTIONS
function showMask () {
    // showMask
    // =======================================================
    var idslct = charIDToTypeID( "slct" );
        var desc21 = new ActionDescriptor();
        var idnull = charIDToTypeID( "null" );
            var ref21 = new ActionReference();
            var idChnl = charIDToTypeID( "Chnl" );
            var idChnl = charIDToTypeID( "Chnl" );
            var idMsk = charIDToTypeID( "Msk " );
            ref21.putEnumerated( idChnl, idChnl, idMsk );
        desc21.putReference( idnull, ref21 );
        var idMkVs = charIDToTypeID( "MkVs" );
        desc21.putBoolean( idMkVs, true );
    executeAction( idslct, desc21, DialogModes.NO );
function hideMask () {
    // hideMask
    // =======================================================
        var idslct = charIDToTypeID( "slct" );
            var desc22 = new ActionDescriptor();
            var idnull = charIDToTypeID( "null" );
                var ref22 = new ActionReference();
                var idChnl = charIDToTypeID( "Chnl" );
                var idChnl = charIDToTypeID( "Chnl" );
                var idRGB = charIDToTypeID( "RGB " );
                ref22.putEnumerated( idChnl, idChnl, idRGB );
            desc22.putReference( idnull, ref22 );
            var idMkVs = charIDToTypeID( "MkVs" );
            desc22.putBoolean( idMkVs, false );
        executeAction( idslct, desc22, DialogModes.NO );