Add an alert about nickserv on #ubuntu-it-chat

www/index.html

@@ -88,6 +88,11 @@
 			<div id="chat" style="display: none;">
 				<div id="content-top"></div>
 				<div class="container">
+                    <div class="comunita-notice" id="chat-notice" style="display: none; padding-top: 5px">
+                        <b>Attenzione!</b> Per parlare nel canale #ubuntu-it-chat è necessario
+                        <a href="https://freenode.net/kb/answer/registration">
+                        registrare un nickname</a>.
+                    </div>
 					<div style="padding: 3px;">
 						<iframe id="chat_frame" src="javascript:void(false)"></iframe>
 					</div>
@@ -131,6 +136,10 @@
 				// force reload the iframe, which was denied by security limits
 
 				function join(channel) {
+                    if (channel === "#ubuntu-it-chat") {
+                        $('#chat-notice').show();
+                    }
+
 					document.getElementById('chat_frame').contentWindow.location.reload(true);
 					$( '#chat_frame' ).attr('src', "iframe_container.html"+channel);
 					$('#chat').show();

www/libs/chat.css

@@ -121,7 +121,7 @@ h3 a {
 
 .comunita-notice {
 	display: block;
-	margin: 10px 0;
+	padding: 10px 0;
 	text-align: center;
 }