diff --git a/index.html b/index.html
index 71bd36f..332814b 100755
--- a/index.html
+++ b/index.html
@@ -756,9 +756,9 @@ $(document).ready(function(){
 					<p>
 						<a id="downloader" download="magazine.json">download magazine...</a>
 						<input type="file" id="upload" name="files[]"/>
-						<a href="./layout.html">alternative layout (native scroll)</a>
-						<a href="./layout-iscroll.html">alternative layout (iscroll)</a>
-						<a href="./layout-iscroll2.html">alternative layout (drag)</a>
+						Alternative layout: <a href="./layout.html">native scroll</a>, 
+						<a href="./layout-iscroll.html">iscroll</a>, 
+						<a href="./layout-iscroll2.html">hand-written drag</a>
 					</p>
 
 					<hr noshade color="silver">
diff --git a/layout-iscroll2.html b/layout-iscroll2.html
index 3260f63..07e97de 100755
--- a/layout-iscroll2.html
+++ b/layout-iscroll2.html
@@ -79,32 +79,6 @@
 <script>
 
 $(document).ready(function(){
-	// log...
-	/*
-	var _log = $('<div id="log"></div>')
-		.css({
-			position: 'fixed',
-			background: 'silver',
-			opacity: 0.5,
-			width: 200,
-			height: '80%',
-			top: 10,
-			left: 10,
-			'z-index': 90000,
-			overflow: 'hidden',
-			padding: 10,
-		})
-		.text('log')
-		.appendTo($('body'))
-	function log(text){
-		_log.html(_log.html() + '<br>' + text + '')
-		_log.scrollTop(_log.prop('scrollHeight'))
-	}
-	function clear_log(){
-		_log.html('')
-	}
-	*/
-
 	// keyboard...
 	$(document)
 		.keydown(makeKeyboardHandler({
@@ -129,20 +103,13 @@ $(document).ready(function(){
 		}, 
 		function(k){console.log(k)}))
 
-	/*
-	window.myScroll = new iScroll('viewer', {
-		vScroll: false,
-		snap: '.page',
-		momentum: false,
-		hScrollbar: false,
-	})
-	*/
-	
 
+	logger = Logger()
 	var scrolling = false
 	var _x = null
 	$('.viewer')
 		.on('mousedown touchstart', function(){
+			logger.log('[touchstart]')
 			scrolling = true
 			togglePageDragging('on')
 		})
@@ -153,11 +120,13 @@ $(document).ready(function(){
 			}
 			var x = evt.clientX
 			if(scrolling){
+				logger.log('[drag]')
 				shiftMagazineTo(getMagazineShift() + (x - _x))
 			}
 			_x = x
 		})
 		.on('mouseup touchend', function(){
+			logger.log('[touchend]')
 			scrolling = false
 			togglePageDragging('off')
 		})
diff --git a/lib/jli.js b/lib/jli.js
index c63a918..33194bf 100755
--- a/lib/jli.js
+++ b/lib/jli.js
@@ -422,6 +422,56 @@ jQuery.fn.sortChildren = function(func){
 
 
 
+/********************************************************** logger ***/
+
+function Logger(){
+	_log = null
+	return {
+		setup: function(){
+			if(_log == null){
+				_log = $('<div id="log"></div>')
+					.css({
+						position: 'fixed',
+						background: 'silver',
+						opacity: 0.5,
+						width: 200,
+						height: '80%',
+						top: 10,
+						left: 10,
+						'z-index': 90000,
+						overflow: 'hidden',
+						padding: 10,
+					})
+					.text('log')
+					.appendTo($('body'))
+			} else {
+				_log.appendTo($('body'))
+			}
+			return this
+		},
+		remove: function(){
+			_log.detach()
+			return this
+		},
+		log: function(text){
+			_log.html(_log.html() + '<br>' + text + '')
+			_log.scrollTop(_log.prop('scrollHeight'))
+			return this
+		},
+		clear: function(){
+			_log.html('')
+			return this
+		},
+		get: function(){
+			return _log
+		},
+		set: function(elem){
+			_log = elem
+		}
+	}.setup()
+}
+
+
 
 /**********************************************************************
 * vim:set ts=4 sw=4 :                                                */