function addEvent(elm, evType, fn, useCapture) {
   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;
   }
}

addEvent(window, 'load', addLinkTracker, false);
//addEvent(window, 'onbeforeunload', click('unload'), false);


function addLinkTracker() {
   if (!document.getElementsByTagName) return false;
   linksElements = document.getElementsByTagName('a')
   for (var i = 0; i < linksElements.length; i++) {
      addEvent(linksElements[i], 'mousedown', recordClick, true);
      if (! linksElements[i].getAttribute('id') ) {
         linksElements[i].setAttribute('id',"link_" + i)
      }
   }
}

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 = source.getAttribute("alt");
   }
   else {
      id = source.getAttribute('id');
      target = source.getAttribute('href');
      label = source.childNodes[0].nodeValue;
   }
   url = document.location.href;

   click(target);

   if (e.ctrlKey) { 

   }
	
}


var http = false;
if(navigator.appName == "Microsoft Internet Explorer") { http = new ActiveXObject("Microsoft.XMLHTTP"); }
else { http = new XMLHttpRequest(); } 


function click(url) {
   var fullurl = "ajax.html?value=" + escape(url);
   http.open("GET", fullurl, true);
   http.onreadystatechange=function() {
     if(http.readyState == 4) {
     }
   }
   http.send(null);
}

function notify(is_checked,post_id) {
   var fullurl = "ajax.html?notify=" + is_checked + "&post_id=" + post_id;
   http.open("GET", fullurl, true);
   http.onreadystatechange=function() {
     if(http.readyState == 4) {
     }
   }
   http.send(null);     
}

function like(id,action) {
   http.open("GET", "ajax.html?id=" + id + "&action=" + action, true);
   http.onreadystatechange=function() {
      if(http.readyState == 4) {
         document.getElementById('like-' + id).style.visibility = "visible";
         document.getElementById('like-' + id).style.display = "block";
         document.getElementById('like-' + id).innerHTML = http.responseText;
         if (action == "like") {
            document.getElementById('iLike-' + id).innerHTML = '<span class=likeclick onclick="like(' + id + ',\'unlike\'); return false;">Un-like</span>';
            document.getElementById('iDislike-' + id).innerHTML = '<span class=likeclick onclick="like(' + id + ',\'dislike\'); return false;">Dislike</span>';
         }
         if (action == "dislike") {
            document.getElementById('iLike-' + id).innerHTML = '<span class=likeclick onclick="like(' + id + ',\'like\'); return false;">Like</span>';
            document.getElementById('iDislike-' + id).innerHTML = '<span class=likeclick onclick="like(' + id + ',\'undislike\'); return false;">Un-dislike</span>';
         }
         if (action == "unlike") {
            document.getElementById('iLike-' + id).innerHTML = '<span class=likeclick onclick="like(' + id + ',\'like\'); return false;">Like</span>';
            document.getElementById('iDislike-' + id).innerHTML = '<span class=likeclick onclick="like(' + id + ',\'dislike\'); return false;">Dislike</span>';
         }
         if (action == "undislike") {
            document.getElementById('iLike-' + id).innerHTML = '<span class=likeclick onclick="like(' + id + ',\'like\'); return false;">Like</span>';
            document.getElementById('iDislike-' + id).innerHTML = '<span class=likeclick onclick="like(' + id + ',\'dislike\'); return false;">Dislike</span>';
         }
      }
   }
   http.send(null);
}




function doAjax(functionid,item) {

      //alert('Doing Ajax ...\nAction:' + functionid + '\nVal: ' + item);
   
      var http_request = false;

      if (window.XMLHttpRequest) { 
          http_request = new XMLHttpRequest();
      } 
      else if (window.ActiveXObject) {
          try {
              http_request = new ActiveXObject("Msxml2.XMLHTTP");
          }
          catch (e) {
              try {
                  http_request = new ActiveXObject("Microsoft.XMLHTTP");
              }
              catch (e) {}
          }
      }

      if (!http_request) {
          return false;
      }

      http_request.onreadystatechange = function() {
          if (http_request.readyState == 4) {
              if (http_request.status == 200) {
                  alert('Completed: ' + http_request.responseText);
              }
              else {
                  alert('There was a problem with the request. (Code: ' + http_request.status + ')');
              }
          }
      }
      http_request.open('GET', 'ajax.html?id=' + functionid + '&value=' + item, true);
      http_request.send(null);

      if (functionid == 'click') {
         window.location = item;
         return false;
      }
}