how to change values returned by JSON hash

how to change values returned by JSON hash

All of the following works fine - except when I put in the switch() to adjust a value returned

        $.getJSON( urlCalled, parametersUsed, function(dataReturned)
            {
                pj= dataReturned;
                    var a = pj;
                    jQuery.each(a, function(n) {
                    var v = switch(a[n].value1) {case 'YES':'Active' break case 'NO':'Inactive' break}) + ' ' + a[n].value2;
                    alert(v);
                    });

Help with syntax or do I need a nested each() would be very helpful - thank you