diff --git a/public_html/channel.html b/public_html/channel.html
index dd53c74..7a63c90 100644
--- a/public_html/channel.html
+++ b/public_html/channel.html
@@ -16,7 +16,7 @@
 <div id="wrapper" data-role="page">
 	<div data-role="header" data-position="fixed" data-theme="d">
 		<a id="update" data-role="button" data-icon="refresh" data-iconpos="notext">update</a>
-		<h1 id="channel"></h1>
+		<h1 id="channel">How to use SIRC</h1>
 		<a id="setting" data-role="button" data-icon="gear" data-iconpos="notext">setting</a>
 		<div id="menu" style="display:none;">
 			<ul data-role="listview">
@@ -39,7 +39,11 @@ <h1 id="channel"></h1>
 	</div>
 	<div data-role="content" data-theme="d">
 		<ul id="log" data-role="listview">
-			<li>javascript needed</li>
+			<li>Append the channel name (as hash fragment) where you want to join.</li>
+			<li>(Ex) sirc.domain.com/sgm<strong>#snucse12</strong></li>
+			<li>That's all.</li>
+			<li>Enjoy your <strong>irc</strong>ing!</li>
+			<li>https://github.com/sim0629/sirc/wiki</li>
 		</ul>
 	</div>
 	<div data-role="footer" data-position="fixed" data-theme="d">
diff --git a/public_html/css/sirc.css b/public_html/css/sirc.css
index 41813df..b13f208 100644
--- a/public_html/css/sirc.css
+++ b/public_html/css/sirc.css
@@ -1,9 +1,9 @@
 @charset "utf-8";
 
-div.datetime { font-size:8px; font-weight:normal; text-align:center; float:left; letter-spacing:-1px; line-height:1; }
-div.source { font-weight:normal; float:left; margin:0px 5px; }
+div.datetime { font-size:8px; text-align:center; float:left; letter-spacing:-1px; line-height:1; }
+div.source { float:left; margin:0px 5px; }
 span.nick { font-weight:bold; }
-div.message { word-wrap:break-word; font-weight:normal; }
-ul#log li { padding:5px !important; border-color:#efefef; }
+div.message { word-wrap:break-word; }
+ul#log li { padding:5px !important; font-weight:normal; border-color:#efefef; }
 label { float:left; padding-top:7px; }
 
diff --git a/public_html/js/sirc.js b/public_html/js/sirc.js
index 8d0577d..db4986f 100644
--- a/public_html/js/sirc.js
+++ b/public_html/js/sirc.js
@@ -66,6 +66,8 @@ var sirc_update = function() {
 };
 
 var sirc_send = function() {
+	var message = $('input#message').val();
+	if(message == '') return false;
 	$.ajax({
 		type: 'GET',
 		url: '/sgm/send/',
@@ -86,6 +88,7 @@ var sirc_send = function() {
 };
 
 var sirc_join = function() {
+	if(!window.location.hash) return;
 	channel = window.location.hash;
 	$('title').html(channel + ' - SIRC');
 	$('h1#channel').html(channel);
@@ -103,12 +106,5 @@ $(document).ready(function() {
 	$('form#send').submit(function() { return sirc_send(); });
 	$('input#message').keydown(function (e) { if(e.keyCode == 13) return sirc_send(); });
 	$(window).hashchange(function() { return sirc_join(); });
-
-	if(!window.location.hash) {
-		$('ul#log').html('<li>hash(channel) needed</li>');
-		$('ul#log').listview('refresh');
-		return;
-	}
 	sirc_join();
-
 });