function updateWantsModels()
{
  if (ajaxwants.readyState == 4)
  {
    document.getElementById('wantsmodel').innerHTML = ajaxwants.responseText;
  }
}

function getWantsModels(manufacturerId)
{
  var url = "/getWantsData.php?manufacturer_id=";
  ajaxwants.open("GET", url + escape(manufacturerId), true);
  ajaxwants.onreadystatechange = updateWantsModels;
  ajaxwants.send(null);
}

var ajaxwants = getHTTPObject();