<label><input type="checkbox" name="market" checked="checked"
onchange="document.getElementById('from').style.display = (this.checked ? '' : 'none')"/>
Lui envoyer un marketing</label>
<label><input type="checkbox" name="market" checked="checked"
onchange="document.getElementById('from').style.display = (this.checked ? '' : 'none')"/>
Lui envoyer un marketing</label>