//this is the function on file.php
function nomes_comerciais() {
		$query = "SELECT * FROM comerciais ORDER BY nome asc";
		$resultado = mysql_query($query) or die( mysql_error() );
		while($linha = mysql_fetch_array($resultado)){
			print( "<option value='".$linha['nome']."'>".$linha['nome']."</option>");
		}
	}

//then on index.php i make a require of file.php (wich is the file with the insert query too and the select is like this:
Comercial Angariador: <select name="comercial-ang">
<option> ----- </option>
<?
nomes_comerciais();
?>   
</select><br />

//on the query i'm putting $_POST['comercial-ang'] but it's not inserting on the db