diff --git a/extras/chrome_extension/js/background.js b/extras/chrome_extension/js/background.js
index 2a1ce80656..8f3b80e866 100644
--- a/extras/chrome_extension/js/background.js
+++ b/extras/chrome_extension/js/background.js
@@ -1,6 +1,7 @@
 var refreshTimer = null;
 var isFetching = null;
-var storedEvents=new Array();
+var storedEvents = new Array();
+var notVisited = {};
 
 $(window).load(function() {
 	initilise();
@@ -13,6 +14,13 @@ function fetchEvents() {
 	return storedEvents;
 }
 
+function fetchNotVisited() {
+	return notVisited;
+}
+
+function removeNotVisited(eventId) {
+	if (notVisited[eventId] === true) delete notVisited[eventId];
+}
 
 function main() {
 
@@ -55,31 +63,43 @@ function getEvents(reply){
 
 	// If there is no events requested, mark all as visited
 	if (storedEvents.length == 0) {
-		for(var k=0;k<fetchedEvents.length;k++){
-			fetchedEvents[k]['visited'] = true;
-		}
+		notVisited = {};
 		storedEvents = fetchedEvents;
 		return;
 	}
 
 	// Discriminate the new events
 	newEvents=fetchNewEvents(fetchedEvents,storedEvents);
+	var newNotVisited = {};
+	var notVisitedCount = 0;
 	
-	// Display the notifications only if popup is not showing
+	// Check if popup is displayed to make some actions
 	var views = chrome.extension.getViews({ type: "popup" });
-	if (views.length == 0) {
-		for(var k=0;k<newEvents.length;k++){
-			localStorage["new_events"]++;
+	for(var k=0;k<newEvents.length;k++){
+		newNotVisited[newEvents[k]['id']] = true;
+		if (views.length == 0) {
+			notVisitedCount++;
 			displayNotification (newEvents[k])
 			alertsSound(newEvents[k]);
 		}
-	} else {
-		localStorage["new_events"] = 0;
 	}
 
-	storedEvents = fetchedEvents;
+	// Make that the old events marked as not visited remains with the
+	// same status
+	for(var k=0;k<fetchedEvents.length;k++){
+		if (notVisited[fetchedEvents[k]['id']] === true) {
+			newNotVisited[fetchedEvents[k]['id']] = true;
+			notVisitedCount++;
+		}
+	}
+	notVisited = newNotVisited;
 
+	// Update the number
+	localStorage["new_events"] = (views.length == 0) ? notVisitedCount : 0;
 	updateBadge();
+
+	// Store the requested events
+	storedEvents = fetchedEvents;
 }
 
 function updateBadge() {
diff --git a/extras/chrome_extension/js/popup.js b/extras/chrome_extension/js/popup.js
index 0017e7f83f..d306521e64 100644
--- a/extras/chrome_extension/js/popup.js
+++ b/extras/chrome_extension/js/popup.js
@@ -69,7 +69,8 @@ function showEvents(){
 	if(e_refr){
 			wrapper.removeChild(e_refr);
 	}
-	var allEvents=bg.fetchEvents();            
+	var allEvents = bg.fetchEvents();
+	var notVisitedEvents = bg.fetchNotVisited();
 	var eve=document.createElement('div');
 	eve.id="event_temp";
 	eve.setAttribute("class","b");
@@ -83,7 +84,7 @@ function showEvents(){
 			img.width = '9';
 			img.height='9';
 			img.className ='pm';
-			img.id='i_' + i;
+			img.id='i_' + i  + '_' + allEvents[i]['id'];
 			eve_title.appendChild(img);
 			var a = document.createElement('a');
 			var temp_style;
@@ -117,6 +118,10 @@ function showEvents(){
 					eve_title.setAttribute("style","background:#BABDB6; margin-bottom:-12px;"+temp_style);
 					break;
 			}
+
+			if (notVisitedEvents[allEvents[i]['id']] === true) {
+				eve_title.style.fontWeight = 600;
+			}
 			
 			eve_title.appendChild(a);
 			eve.appendChild(eve_title);
@@ -152,8 +157,17 @@ function showEvents(){
 
 function showHide() {
 	var id = $(this).attr('id');
-	var num = id.split("_")[1];
-	var pid = "p_" + num;
+	// Image id has the form i_<position>_<eventId>
+	var nums = id.split('_');
+	var pid = "p_" + nums[1];
+
+	// Mark as visited if visited
+	if($(this).parent().css('font-weight') == '600') {
+		bg.removeNotVisited(nums[2]);
+		$(this).parent().css('font-weight', '');
+	}
+
+	// Toggle information
 	if($('#' + pid).css('display') == 'none') {
 		$('#' + pid).slideDown("fast");
 		$(this).attr({src: 'images/minus.gif'});