/*if(
   (navigator.appVersion.substring(0,1) == "5" && navigator.userAgent.indexOf('Gecko') != -1)
   || (navigator.userAgent.search(/Opera/) != -1)
  )
   {
    document.write('<meta http-equiv="pragma" content="no-cache">');
   }
*/

function GetElementById(id)
{
  if (document.getElementById(id))
  {
    return document.getElementById(id);
  } else if (document.all[id])
  {
    return document.all[id];
  } else if (document.layers && document.layers[id])
  {
    return (document.layers[id]);
  } else
  {
    return false;
  }
}

function toggle_dynmenu(id, imagebase)  {
    if (GetElementById(id + '_sub')) {
        var dom = GetElementById(id + '_sub').style.display;
        if (dom == 'none') {
            GetElementById(id + '_sub').style.display = 'inline';
            GetElementById(id + '_sign').src   = imagebase+'/minus.gif';
            GetElementById(id + '_folder').src = imagebase+'/tree_open.gif';
            } else if (dom == 'inline') {
                GetElementById(id + '_sub').style.display = 'none';
                GetElementById(id + '_sign').src   = imagebase+'/plus.gif';
                GetElementById(id + '_folder').src = imagebase+'/tree_close.gif';
            }
    }
}