Changing all Layer names to Uppercase

Question

I have been trying to clean up the layers in a document(s) with the following script.  It all works except for the UPPERCASE line.
Does anyone have any ideas?
function standardizeLayerNames()
                var myDoc7=app.activeDocument
                var myLayerCount7 = myDoc7.layers.length
                for(var myCounter7 = 0; myCounter7 < myLayerCount7; myCounter7++){
                        var selectLayer7 = myDoc7.layers[myCounter7]
                        selectLayer7.visible=true
                        selectLayer7.locked=false
                        selectLayer7.name = selectLayer7.name.replace ("-", "_")
                        selectLayer7.name = selectLayer7.name.replace(" ", "_")
                        selectLayer7.name = selectLayer7.name.CaseChangeType.UPPERCASE

Answer 1

function standardizeLayerNames() {
          var myDoc7 = app.activeDocument;
          var myLayerCount7 = myDoc7.layers.length;
          for (var myCounter7 = 0; myCounter7 < myLayerCount7; myCounter7++) {
                    var selectLayer7 = myDoc7.layers[myCounter7];
                    selectLayer7.visible = true;
                    selectLayer7.locked = false;
                    selectLayer7.name = selectLayer7.name.replace(/[- ]/g, "_").toUpperCase();