diff --git a/YACOSWeb/WebContent/WEB-INF/jsp/listConference.jsp b/YACOSWeb/WebContent/WEB-INF/jsp/listConference.jsp
index 0b4d093..a1b5f61 100644
--- a/YACOSWeb/WebContent/WEB-INF/jsp/listConference.jsp
+++ b/YACOSWeb/WebContent/WEB-INF/jsp/listConference.jsp
@@ -1,7 +1,33 @@
 <%@ include file="/WEB-INF/decorators/include.jsp"%>
 
 <html>
-<head></head>
+<head>
+
+<script type='text/javascript' src='./javascripts/prototype.js'></script>
+
+<script type="text/javascript">
+	function HideRegistered() {
+		var listElem = $$('.isRegistered');
+		for (var i = 0; i < listElem.length; i++) {
+			if (listElem[i].visible())  	
+  				listElem[i].style.display = "none";
+  			else
+  				listElem[i].style.display = "";
+  		}
+	}
+	
+	function HideNotRegistered() {
+		var listElem = $$('.notRegistered');
+		for (var i = 0; i < listElem.length; i++) {
+			if (listElem[i].visible())  	
+  				listElem[i].style.display = "none";
+  			else
+  				listElem[i].style.display = "";
+  		}
+	}
+</script>
+
+</head>
 <body>
 
 <h4 class="title">Conference's list</h4>
@@ -25,10 +51,6 @@
 		</div>
 	</c:if>
 
-	<p class="formHelp">
-		Choose a conference
-	</p>	
-	
 	<c:choose>
 		<c:when test="${empty listConference}">
 		<div class="errorBox">
@@ -36,45 +58,53 @@
 		</div>
 		</c:when>
 		<c:otherwise>
+			<p class="formHelp">
+				Choose a conference
+			</p>
+			
+			<table width="100%">
+			<tr>
+				<td width="7%">Hide</td>
+				<td width="93%"><input type="checkbox" name="register" value="Register" onchange="HideRegistered()"> Conference you are registered in<br />
+					<input type="checkbox" name="notregister" value="NotRegister" onchange="HideNotRegistered()"> Conference you are not registered in
+				</td>
+			</tr>
+			</table>
+			
     		<c:forEach items="${listConference}" var="conference">
-				<div class="conferenceBloc cbb">
-					<h2>
-					<c:set var="varName" value="false" />
-					<c:forEach items="${listRole}" var="role">
-						<c:if test="${conference.id == role.conference.id and varName == 'false' }">
-							<c:set var="varName" value="true" />
-						</c:if>
-					</c:forEach>
-					<c:choose>
+    			<c:set var="varName" value="false" />
+				<c:forEach items="${listRole}" var="role">
+					<c:if test="${conference.id == role.conference.id and varName == 'false' }">
+						<c:set var="varName" value="true" />
+					</c:if>
+				</c:forEach>
+				<c:choose>
 					<c:when test="${varName == 'true'}">
-						${conference.title} - In this conference you are:
-						<c:forEach items="${listRole}" var="role">
-						<c:if test="${conference.id == role.conference.id}">
-
-							${fn:toLowerCase(role.type)}
-											
-						</c:if>
-					</c:forEach>
-					</c:when>
-					<c:otherwise>
-						${conference.title} - You haven't any role in this conference
-					</c:otherwise>
-					</c:choose>
-					</h2>
-					<b>Description:</b> ${conference.description}<br />
-					<c:choose>
-					<c:when test="${varName == 'true'}">
-						<center>
+						<div class="conferenceBloc cbb isRegistered">
+							<h2>
+								${conference.title} - In this conference you are:
+								<c:forEach items="${listRole}" var="role">
+								<c:if test="${conference.id == role.conference.id}">
+									${fn:toLowerCase(role.type)}				
+								</c:if>
+								</c:forEach>
+							</h2>
+							<b>Description:</b> ${conference.description}<br />
+							<center>
 							<a href="<c:url value="/chooseConference.htm?idConf=${conference.id}" />">Select</a><br />
-						</center>
+							</center>
+						</div>
 					</c:when>
 					<c:otherwise>
-						<center>
+						<div class="conferenceBloc cbb notRegistered">
+							<h2>${conference.title} - You haven't any role in this conference</h2>
+							<b>Description:</b> ${conference.description}<br />
+							<center>
 							<a href="<c:url value="/chooseConference.htm?idConf=${conference.id}" />">View details</a><br />
-						</center>
+							</center>
+						</div>
 					</c:otherwise>
-					</c:choose>
-				</div>
+				</c:choose>
 			</c:forEach>
     	</c:otherwise>
 	</c:choose>
