/* 
*  Copyright 2006-2007 Dynamic Site Solutions.
*  Free use of this script is permitted for non-commercial applications,
*  subject to the requirement that this comment block be kept and not be
*  altered.  The data and executable parts of the script may be changed
*  as needed.  Dynamic Site Solutions makes no warranty regarding fitness
*  of use or correct function of the script.  Terms for use of this script
*  in commercial applications may be negotiated; for this, or for other
*  questions, contact "license-info@dynamicsitesolutions.com".
*
*  Script by: Dynamic Site Solutions -- http://www.dynamicsitesolutions.com/
*  Last Updated: 2007-06-17
*/

//IE5+/Win, Firefox, Netscape 6+, Opera 7+, Safari, Konqueror 3, IE5/Mac, iCab 3

var addBookmarkObj =
{
	linkText:'bookmark this',

	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.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,this.title);
				return false;
			}
		}

		a.title = document.title;
		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 isIE = (ua.indexOf("msie") != -1)
		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 != null && (!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
			return false;
		}

		else if(isKonq) //Konqueror for Linux
			alert('You need to press CTRL + B to bookmark our site.');

		else if(window.opera) // do nothing here (Opera 7+)
			void(0);

		else if(window.home || isSafari || isIE || isMac) // Firefox, Netscape, Safari, iCab (Mac only)
			alert('You need to press ' + buttonStr + ' + 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');
});
*/