function addLinkTracker()
{
	if (!document.getElementsByTagName) return false;

	linksElements = document.getElementsByTagName('a')
	for (var i = 0; i < linksElements.length; i++) 
	{
		// If a link does not have any id 
		if (! linksElements[i].getAttribute('id') ) {
		} else {
     addEvent(linksElements[i], 'mousedown', recordClick, false);
		}
	}
}


function recordClick(e)
{

	if (typeof e == 'undefined')
		var e = window.event;

	var source;
	if (typeof e.target != 'undefined') 
	{
		source = e.target;
	} else if (typeof e.srcElement != 'undefined') {
		source = e.srcElement;
	} else {
		return true;
	}

	if (source.nodeType == 3)
		source = source.parentNode;
		
	var id, target, URL, label
	
	if( source.tagName == "IMG" )
	{
		if( source.parentNode.tagName == "A" )
		{
			id = source.parentNode.getAttribute('id');
			target = source.parentNode.getAttribute('href');
		}
		label = escape(source.getAttribute("alt"));		
	}else{
		id = source.getAttribute('id');
		target = source.getAttribute('href');		
		label = escape(source.childNodes[0].nodeValue);
	}
	url = document.location.href;
	//---------------------------------
	
	var pars = '';	
	apiurl = actionurl + "id=" + escape(id) + "&label=" + label + "&target=" + encode64(target) + "&url=" + encode64(url) + "&rand="+Math.random();
	sendRequest(apiurl,passThrough);

	return false;	
}



function passThrough( req )
{
	// Helps debug api errors
	// alert( req.responseText );
	
}

//------------------------------------------------------------------

function encode64(input) {
   var keyStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
   var output = "";
   var chr1, chr2, chr3;
   var enc1, enc2, enc3, enc4;
   var i = 0;

   do {
      chr1 = input.charCodeAt(i++);
      chr2 = input.charCodeAt(i++);
      chr3 = input.charCodeAt(i++);

      enc1 = chr1 >> 2;
      enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
      enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
      enc4 = chr3 & 63;

      if (isNaN(chr2)) {
         enc3 = enc4 = 64;
      } else if (isNaN(chr3)) {
         enc4 = 64;
      }

      output = output + keyStr.charAt(enc1) + keyStr.charAt(enc2) + 
         keyStr.charAt(enc3) + keyStr.charAt(enc4);
   } while (i < input.length);
   
   return output;
}

function sendRequest(url,callback,postData) {
	var req = createXMLHTTPObject();

	if (!req) return;
	var method = (postData) ? "POST" : "GET";
	req.open(method,url,true);
	req.setRequestHeader('User-Agent','XMLHTTP/1.0');
	if (postData)
		req.setRequestHeader('Content-type','application/x-www-form-urlencoded');
	req.onreadystatechange = function () {
		if (req.readyState != 4) return;
//		if (req.status != 200 && req.status != 304) {
//			alert('HTTP error ' + req.status);
//		return;
//		}
		callback(req);
	}
	if (req.readyState == 4) return;
	req.send(postData);
}

var XMLHttpFactories = [
	function () {return new XMLHttpRequest()},
	function () {return new ActiveXObject("Msxml2.XMLHTTP")},
	function () {return new ActiveXObject("Msxml3.XMLHTTP")},
	function () {return new ActiveXObject("Microsoft.XMLHTTP")}
];

function createXMLHTTPObject() {
	var xmlhttp = false;
	for (var i=0;i<XMLHttpFactories.length;i++) {
		try {
			xmlhttp = XMLHttpFactories[i]();
		}
		catch (e) {
			continue;
		}
		break;
	}
	return xmlhttp;
}

//------------------------------------------------------------------

document.getElementsByClassName = function(className) 
{
  var children = document.getElementsByTagName('*') || document.all;
  var elements = new Array();
  for (var i = 0; i < children.length; i++) {
    var child = children[i];
    var classNames = child.className.split(' ');
    for (var j = 0; j < classNames.length; j++) {
      if (classNames[j] == className) {
        elements.push(child);
        break;
      }
    }
  }
  return elements;
}

function addEvent(elm, evType, fn, useCapture) 
{
  // cross-browser event handling for IE5+, NS6 and Mozilla By Scott Andrew 
  if (elm.addEventListener) { 
    elm.addEventListener(evType, fn, useCapture); 
    return true; 
  } else if (elm.attachEvent) { 
    var r = elm.attachEvent('on' + evType, fn); 
    return r; 
  } else {
    elm['on' + evType] = fn;
  }
}