function jul_showPreview(aMemoId, aBBcodes)
{
  objMemo = document.getElementById(aMemoId);
  if (objMemo == null) return false;
  objPreview = document.getElementById(aMemoId + "Preview");
  if (objPreview == null) return false;
  objHTTP = GetHttpObject();
  if (objHTTP == null) return false;
  objHTTP.open("POST",jul_baseurl+"ajax/preview.php",false);
  objHTTP.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
  objHTTP.send("id="+objPreview.id+"&bbcodes="+(aBBcodes==true?"on":"off")+"&memo="+escape(objMemo.value));
  objPreview.innerHTML = objHTTP.responseText;
  objPreview.style.display = "block";
  return true;
}

function jul_hidePreview(aPreviewId)
{
  objPreview = document.getElementById(aPreviewId);
  if (objPreview == null) return false;
  objPreview.style.display = "none";
  objPreview.innerHTML = "";
  return true;
}