Bookmark = function() {
  var isIEmac = false; /*@cc_on @if(@_jscript && !(@_win32 || @_win16) && (@_jscript_version<5.5)) isIEmac = true; @end @*/
  var isMSIE = (-[1,]) ? false : true;
  var cjTitle = document.title;
  var cjHref = location.href;

  function hotKeys() {
    var ua = navigator.userAgent.toLowerCase();
    var str = '';
    var isWebkit = (ua.indexOf('webkit') != - 1);
    var isMac = (ua.indexOf('mac') != - 1);

    if(ua.indexOf('konqueror') != - 1) {
      str = 'CTRL + B'; // Konqueror
    } else if(window.home || isWebkit || isIEmac || isMac) {
      str = (isMac ? 'command/\u2318' : 'CTRL') + ' + D'; // Netscape, Safari, iCab, IE5/Mac
    }
    return ((str) ? 'To bookmark this page, first click OK then press\n' + str + '.' : str);
  }

  function isIE8() {
    var rv = -1;
    if(navigator.appName == 'Microsoft Internet Explorer') {
      var ua = navigator.userAgent;
      var re = new RegExp("MSIE ([0-9]{1,}[\.0-9]{0,})");
      if(re.exec(ua) != null) {
        rv = parseFloat(RegExp.$1);
      }
    }
    if(rv > - 1) {
      if(rv >= 8.0) {
        return true;
      }
    }
    return false;
  }

  function urlEncodeCharacter(c) {
    return "%" + c.charCodeAt(0).toString(16);
  }

  function addBookmark(a, href, title, nowin) {
    try {
      if(typeof a == "object" && a.tagName.toLowerCase() == "a") {
        a.style.cursor = 'pointer';
        if(href != undefined) {
          cjHref = href;
        }
        if(title != undefined) {
          cjTitle = title;
        }
        if(nowin === undefined) nowin = false;
        if((typeof window.sidebar == "object") && (typeof window.sidebar.addPanel == "function")) {
          window.sidebar.addPanel(cjTitle, cjHref, ""); // Gecko
          return false;   
        } else if(isMSIE && typeof window.external == "object") {
          if(isIE8()) {
            window.external.AddToFavoritesBar(cjHref, cjTitle); // IE 8          
          } else {
            window.external.AddFavorite(cjHref, cjTitle); // IE <=7
          }
          return false;
        } else if(window.opera) {
          a.href = cjHref;
          a.title = cjTitle;
          a.rel = 'sidebar'; // Opera 7+
          return true;
        } else {
          if(nowin == false) {
            window.open(cjHref + "?alert=" + encodeURIComponent(hotKeys()).replace(/\%20/g, "+").replace(/[!'()*~]/g, urlEncodeCharacter));
          }
          else {
            alert(hotKeys());
          }
        }
      } else {
        throw "Error occured.\r\nNote, only A tagname is allowed!";
      }
    } catch (err) {
      alert(err);
    }

  }

  return {
    addBookmark : addBookmark
  }
}();