function bookmark(a, url, title)
{
  if (!url) url = location.href;
  if (!title) title = document.title;
  
  //Gecko
  if ((typeof window.sidebar == "object") && (typeof window.sidebar.addPanel == "function")) {
    window.sidebar.addPanel (title, url, ""); 
  //IE4+
  } else if (typeof window.external == "object") {
    window.external.AddFavorite(url, title);
  //Opera7+
  } else if (window.opera) {
    a.href = url;
    a.rel = 'sidebar';
    a.title = title;
//    return true;
  }
  else return false;
  
  return true;
}

function checkenter(event) {
    NS4 = (document.layers) ? true : false;
    var code = 0;
    if (NS4)
	code = event.which;
    else
	code = event.keyCode;
    if (code==13)
	return true
    else
	return false;
}