var addBookmarkObj = {
    linkText: 'Bookmark This Page',
    linkTabIndex: '75',
    addTextLink: function(parId) {
        var a = addBookmarkObj.makeLink(parId);
        if (!a) return;
        a.appendChild(document.createTextNode(addBookmarkObj.linkText));
    },
    addImageLink: function(parId, imgPath) {
        if (!imgPath || isEmpty(imgPath)) return;
        var a = addBookmarkObj.makeLink(parId);
        if (!a) return;
        var img = document.createElement('img');
        img.title = img.alt = addBookmarkObj.linkText;
        img.src = imgPath;
        a.appendChild(img);
    },
    makeLink: function(parId) {
        if (!document.getElementById || !document.createTextNode) return null;
        parId = ((typeof (parId) == 'string') && !isEmpty(parId))
      ? parId : 'addBookmarkContainer';
        var cont = document.getElementById(parId);
        if (!cont) return null;
        var a = document.createElement('a');
        a.tabindex = addBookmarkObj.linkTabIndex;
        a.href = location.href;
        if (window.opera) {
            a.rel = 'sidebar'; // this makes it work in Opera 7+
        } else {
            // this doesn't work in Opera 7+ if the link has an onclick handler,
            // so we only add it if the browser isn't Opera.
            a.onclick = function() {
                addBookmarkObj.exec(this.href, document.title);
                return false;
            }
        }
        a.title = addBookmarkObj.linkText;
        return cont.appendChild(a);
    },
    exec: function(url, title) {
        // user agent sniffing is bad in general, but this is one of the times 
        // when it's really necessary
        var ua = navigator.userAgent.toLowerCase();
        var isKonq = (ua.indexOf('konqueror') != -1);
        var isSafari = (ua.indexOf('webkit') != -1);
        var isMac = (ua.indexOf('mac') != -1);
        var buttonStr = isMac ? 'Command/Cmd' : 'CTRL';

        if (window.external && (!document.createTextNode ||
      (typeof (window.external.AddFavorite) == 'unknown'))) {
            // IE4/Win generates an error when you
            // execute "typeof(window.external.AddFavorite)"
            // In IE7 the page must be from a web server, not directly from a local 
            // file system, otherwise, you will get a permission denied error.
            window.external.AddFavorite(url, title); // IE/Win
        } else if (isKonq) {
            alert('You need to press CTRL + B to bookmark our site.');
        } else if (window.opera) {
            void (0); // do nothing here (Opera 7+)
        } else if (window.home || isSafari) { // Firefox, Netscape, Safari, iCab
            alert('You need to press ' + buttonStr + ' + D to bookmark our site.');
        } else if (!window.print || isMac) { // IE5/Mac and Safari 1.0
            alert('You need to press Command/Cmd + D to bookmark our site.');
        } else {
            alert('In order to bookmark this site you need to do so manually ' +
        'through your browser.');
        }
    }
}

function isEmpty(s){return ((s=='')||/^\s*$/.test(s));}

function dss_addEvent(el,etype,fn) {
  if(el.addEventListener && (!window.opera || opera.version) &&
  (etype!='load')) {
    el.addEventListener(etype,fn,false);
  } else if(el.attachEvent) {
    el.attachEvent('on'+etype,fn);
  } else {
    if(typeof(fn) != "function") return;
    if(typeof(window.earlyNS4)=='undefined') {
      // to prevent this function from crashing Netscape versions before 4.02
      window.earlyNS4=((navigator.appName.toLowerCase()=='netscape')&&
      (parseFloat(navigator.appVersion)<4.02)&&document.layers);
    }
    if((typeof(el['on'+etype])=="function")&&!window.earlyNS4) {
      var tempFunc = el['on'+etype];
      el['on'+etype]=function(e){
        var a=tempFunc(e),b=fn(e);
        a=(typeof(a)=='undefined')?true:a;
        b=(typeof(b)=='undefined')?true:b;
        return (a&&b);
      }
    } else {
      el['on'+etype]=fn;
    }
  }
}

dss_addEvent(window,'load',addBookmarkObj.addTextLink);

// to make multiple links, do something like this:
/*
dss_addEvent(window,'load',function(){
  var f=addBookmarkObj.addTextLink;
  f();
  f('otherContainerID');
});
*/

// below is an example of how to make an image link with this
// the first parameter is the ID. If you pass an empty string it defaults to
// 'addBookmarkContainer'.
/*
dss_addEvent(window,'load',function(){
  addBookmarkObj.addImageLink('','/images/add-bookmark.jpg');
});
*/