I've been attempting to place this code within my game however it seems to not work. It works in code testing systems, though. Is there a conflict within the game?

<input onclick="musicToggleOn()" type="button" value="On" id="idOn"><input onclick="musicToggleOff()" type="button" value="Off" id="idOff" disabled>
<script>
    var music = false
    var buttonOn = document.getElementById('idOn');
    var buttonOff = document.getElementById('idOff');

    function testMusic() {
        if (music == true) {
            buttonOn.disabled = true;
            buttonOff.removeAttribute('disabled');
        } else {
            buttonOn.removeAttribute('disabled');
            buttonOff.disabled = true;
        }
    }

    function musicToggleOn() {
        music = true
        testMusic();
    }

    function musicToggleOff() {
        music = false
        testMusic();
    }

</script>