function centerWindow(theURL,winName,width,height,features)
{
    var window_width = width;
    var window_height = height;
    var edfeatures= features;
    var window_top = (screen.height-window_height)/2;
    var window_left = (screen.width-window_width)/2;
    newWindow=window.open(''+ theURL + '',''+ winName + '','width=' + window_width + ',height=' + window_height + ',top=' + window_top + ',left=' + window_left + ',features=' + edfeatures + '');
    newWindow.focus();
}

/* *
 * 顯示載入信息
 */
function showLoader()
{
  var obj = document.getElementById('loader');

  if (!obj)
  {
    obj = document.createElement("DIV");
    obj.id = "loader";
    obj.innerHTML = "正在處理您的請求...";

    document.body.appendChild(obj);
  }
}

/* *
 * 隱藏載入信息
 */
function hideLoader()
{
  try
  {
    var obj = document.getElementById("loader");
    obj.style.display = 'none';
    document.body.removeChild(obj);
  }
  catch (ex)
  {}
}