<select name="userid" onchange="document.getElementById('marketing').style.display = (this.value == 0 ? 'none' : '')">
<option value="0"></option>
{iterate item=x from=$choix}
<select name="userid" onchange="document.getElementById('marketing').style.display = (this.value == 0 ? 'none' : '')">
<option value="0"></option>
{iterate item=x from=$choix}