I've tried to submit with $.post, on php script i do a query and it return an array, so  i use json_encode($results), but... it seems return an string than the JS don't recognizes as an array.

The JS:

$.post('plugins/LiveResult_1.0/LiveResult_1.0.php',

{

tab:tabela,

val:ultimo,

campos:campos

},

function(resp){

                   for(i=0;i<resp.length;i++){

                   $('ul.ul_options',obj.parents('.div_liveresult')).append('<li>'+resp[i]+'</li>');

         }

})

The PHP:

$tabela = $_POST['tab'];

$pesq = $_POST['val'];

include('../../classes/Conexao.class.php');

new ConectaBanco;

$res = array();

$sql = "SELECT * FROM `$tabela` WHERE ";

$campos = $_POST['campos'];

for($i = 0;$i<count($campos)-1;$i++){

$sql .= "`".$campos[$i]."` LIKE '%$pesq%' OR ";

}

$sql .= "`".$campos[count($campos)-1]."` LIKE '%$pesq%' GROUP BY `id`";

$query = mysql_query($sql) or die(mysql_error());

while($result = mysql_fetch_assoc($query)){

$res[] = $result;

}

echo $resp = json_encode($res);