Mootools onblur, onfocus, form

<script>
window.addEvent('domready', function(){
    var id_E =document.id;
    id_E('nome').addEvents({
        focus: function() {
            if (id_E('nome').value == 'Nome...')
                id_E('nome').setProperty('value','');
        },
        blur: function() {
            if (id_E('nome').value == '')
                id_E('nome').setProperty('value','Nome...');
        }
    });
    id_E('email').addEvents({
        focus: function() {
            if (id_E('email').value == 'E-mail...')
                id_E('email').setProperty('value','');
        },
        blur: function() {
            if (id_E('email').value == '')
                id_E('email').setProperty('value','E-mail...');
        }
    });
</script>

//HTML

<form id="form_newsletter" method="post" action="">
                    <input name="nome" type="text" class="campo-news" id="nome" value="Nome..." size="35" maxlength="255"/>
                    <br /> <br />
                    <input name="email" type="text" class="campo-news" id="email" value="E-mail..." size="35" maxlength="255"/><br />
                    <input type="submit" name="enviar" id="enviar" value="Enviar" />
                    <br /><br />
</form>