Código PHP:
<script language="JavaScript">
var elementos = new Array();
<?
include("conexion.php");
$sql= " SELECT * FROM banners ORDER BY ubicacion ";
$rs_banners=mysql_query($sql);
while ($vec_banners=mysql_fetch_array($rs_banners)){
?>
elementos[i]=<? print $vec_banners['descripcion']; ?>
i++;
<?
}
?>