Perkenalan

<script type='text/javascript'>
alert("Taufik Nurrohman");
</script>

Aksi Berdasarkan Perintah

Dasar

<button onclick="alert('Taufik Nurrohman');">Klik!</button>

Dengan JQuery

<script type='text/javascript'>
$(function() {
    $('button').click(function() {
         alert('Taufik Nurrohman');
    });
});
</script>