function getPromos(c) {

  registerRequest = createRequest();
  if (registerRequest == null) {
    alert("Unable to create request.");
  } else {
    var url = "/ajax/left-promos.php";
    var requestData = "action=get&cat-id="+escape(c);
    registerRequest.onreadystatechange = respondPromos;
    registerRequest.open("POST", url, true);
    registerRequest.setRequestHeader("Content-Type",
      "application/x-www-form-urlencoded");
    registerRequest.send(requestData);
  }
  
}

function respondPromos() {
  if (registerRequest.readyState == 4) {
  
    if (registerRequest.status == 200) {
		document.getElementById('ajax_promo').innerHTML = registerRequest.responseText;
    }
  }
}

function clickPromo(link,p,c) {

  registerRequest = createRequest();
  if (registerRequest == null) {
    alert("Unable to create request.");
  } else {
    var url = "/ajax/left-promos.php";
    var requestData = "action=click&promo-id="+escape(p)+"&cat-id="+escape(c);
    registerRequest.onreadystatechange = endClickPromo(link);
    registerRequest.open("POST", url, true);
    registerRequest.setRequestHeader("Content-Type",
      "application/x-www-form-urlencoded");
    registerRequest.send(requestData);
  }
  
}

function endClickPromo(link) {
	setTimeout('document.location = "' + link.href + '"', 100)
}