Fórum CodigosnaWeb.com

<script type="text/javascript">
var lista = new Array(
"", /* manter vazio */
"email1@email1.com",
"email2@email2.com",
"email3@email3.com" /* o último sem , */
);
</script>

<form name="form" method="POST">
<input type="text" name="para" value="">
<select name="subject" onChange="document.form.para.value=lista[this.selectedIndex];">
<option value="">escolha...</option>
<option value="setor 1">setor 1</option>
<option value="setor 2">setor 2</option>
<option value="setor 3">setor 3</option>
</select>
<input type="submit">
</form>