diff --git a/sources/conf/setup.ini b/sources/conf/setup.ini
index a27ae8a..e262533 100644
--- a/sources/conf/setup.ini
+++ b/sources/conf/setup.ini
@@ -1,9 +1,6 @@
 ; how often get data from serwer
 interval = 2500 ; milliseconds
 
-; extra time for cache to secure transmission delay
-cache = 60000 ; milliseconds
-
 ; authorized user:room (comma separated)
 ; caution: names must be valid for file names !
 ; :room with no user name is a room opened to any user name 
diff --git a/sources/index.php b/sources/index.php
index a497a3d..793815c 100644
--- a/sources/index.php
+++ b/sources/index.php
@@ -1,24 +1,4 @@
 <?php
-function v($v, $czyscHtmlIExit = false) {
-	if ($czyscHtmlIExit) ob_end_clean();
-    echo '<pre>' . print_r($v, true) . '</pre>';
-	if ($czyscHtmlIExit) exit;
-}
-function vv($v, $czyscHtmlIExit = false) {
-	if ($czyscHtmlIExit) ob_end_clean();
-    echo '<pre>';
-	var_dump($v);
-	echo '</pre>';
-	if ($czyscHtmlIExit) exit;
-}
-function vvv($var, & $result = null, $is_view = true)
-{
-    if (is_array($var) || is_object($var)) foreach ($var as $key=> $value) vvv($value, $result[$key], false);
-    else $result = $var;
-
-    if ($is_view) v($result);
-}
-
 function getarr($arr,$key,$default) {
     return isset($arr[$key]) ? $arr[$key] : $default;
 }
@@ -32,11 +12,9 @@ function deleteOldHistory() {
     }
 }
 
-//-------------------------
 // init setup.ini parms
   $ini = parse_ini_file('conf/setup.ini');
   $interval= getarr($ini,'interval',2500);
-  $delay= $interval+getarr($ini,'cache',60000);
   $auth= explode(',',getarr($ini,'auth',''));
 
 // read args
@@ -108,10 +86,11 @@ if ($name.$room=="") {
         </div>
         <script type="text/javascript" src="lib/jquery-2.1.3.min.js"></script>
         <script type="text/javascript">
-            // jQuery Document
             $(document).ready(function() {
                 var id = 'undefined';
-                //If user submits the form
+                var pos = 0;
+                var lastdate = 0;
+
                 $("#submitmsg").click(function() {
                     var clientmsg = $("#usermsg").val();
                     $("#usermsg").val('');
@@ -119,8 +98,7 @@ if ($name.$room=="") {
                     $.ajax({
                         type: 'POST',
                         url: 'post.php',
-                        data: {text: clientmsg,name:'<?php echo $name; ?>',room:'<?php echo $room; ?>',delay:'<?php echo $delay; ?>'},
-                        //cache: false,
+                        data: {text: clientmsg,name:'<?php echo $name; ?>',room:'<?php echo $room; ?>'},
                         async: false,
                         success: function(data) {
                             loadLog();
@@ -132,32 +110,30 @@ if ($name.$room=="") {
                     return false;
                 });
 
-                //Load the file containing the chat log
                 function loadLog() {
                     var oldscrollHeight = $("#chatbox")[0].scrollHeight;
                     $.ajax({
                         type: 'POST',
                         url: 'server.php',
-                        data: {id: id,room:'<?php echo $room; ?>'},
+                        data: {room:'<?php echo $room; ?>', pos: pos, lastdate: lastdate},
                         dataType: 'json',
-                        //cache: false,
                         async: false,
                         success: function(data) {
-                            id = data.id;
+                            pos = data.pos;
                             var html = '';
                             var date;
-                            for (var k in data.data.reverse()) {
-                                date = new Date(parseInt(data.data[k][0])*1000);
-                                date = date.toLocaleTimeString();
-                                date = date.replace(/([\d]+\D+[\d]{2})\D+[\d]{2}(.*)/, '$1$2');
+                            for (var k in data.data) {
+                                lastdate = data.data[k][0];
+                                date = new Date(parseInt(lastdate)*1000);
+                                date = date.toLocaleTimeString().substr(0,5);
                                 html = html
-                                        +"<div class='msgln'>("+date+") <b>"
-                                        +data.data[k][1]+"</b>: "+data.data[k][2]+"<br></div>";
+                                        +"("+date+") <b>"
+                                        +data.data[k][1]+"</b>: "+data.data[k][2]+"<br>";
                             }
-                            $("#chatbox").append(html); //Insert chat messages into the #chatbox div
+                            $("#chatbox").append(html); 
                             var newscrollHeight = $("#chatbox")[0].scrollHeight;
                             if (newscrollHeight > oldscrollHeight) {
-								$("#chatbox").scrollTop($("#chatbox")[0].scrollHeight);
+								               $("#chatbox").scrollTop($("#chatbox")[0].scrollHeight);
                             }
                         },
                     });
diff --git a/sources/post.php b/sources/post.php
index f6e2243..37abb20 100644
--- a/sources/post.php
+++ b/sources/post.php
@@ -1,42 +1,15 @@
 <?php
 
-function v($v, $czyscHtmlIExit = false) {
-	if ($czyscHtmlIExit) ob_end_clean();
-    echo '<pre>' . print_r($v, true) . '</pre>';
-	if ($czyscHtmlIExit) exit;
-}
-function vv($v, $czyscHtmlIExit = false) {
-	if ($czyscHtmlIExit) ob_end_clean();
-    echo '<pre>';
-	var_dump($v);
-	echo '</pre>';
-	if ($czyscHtmlIExit) exit;
-}
-function vvv($var, & $result = null, $is_view = true)
-{
-    if (is_array($var) || is_object($var)) foreach ($var as $key=> $value) vvv($value, $result[$key], false);
-    else $result = $var;
-
-    if ($is_view) v($result);
-}
-
 $text = isset($_POST['text']) ? $_POST['text'] : '';
 $name = isset($_POST['name']) ? $_POST['name'] : '';
 $room = isset($_POST['room']) ? $_POST['room'] : '';
-$delay = isset($_POST['delay']) ? $_POST['delay'] : '';
 
-if ($text === '' || $name === '' || $delay === '') return;
-
-$isApc = extension_loaded('apc');
+if ($text === '' || $name === '' ) return;
 
 $time = time();
 $date = date('Y-m-d', $time);
-$uniqid = uniqid();
-$id = $time.'-'.$uniqid;
 
 $historyDir = './history/';
-
-$tmpFile = $historyDir.$room.'cache2100-01-01';
 $historyFile = $historyDir.$room.$date;
 
 $fh = @fopen($historyFile, 'a');
@@ -48,45 +21,9 @@ if ($fh === false) {
 /* start semafore */
 flock($fh, LOCK_EX);
 
-// data
-$data = array($id, $name, stripslashes(htmlspecialchars($text)));
-
-// write history
+$data = array($time, $name, stripslashes(htmlspecialchars($text)));
 fwrite($fh, implode('>', $data)."\n");
 
-// cache
-if ($isApc) {
-    $cache = apc_fetch('chat');
-    if ($cache === false) {
-        $cache = array();
-    }
-} else {
-    $cache = @file_get_contents($tmpFile);
-    if ($cache === false) {
-        $cache = array();
-    } else {
-        $cache = unserialize($cache);
-    }    
-}
-
-array_unshift($cache, $data);
-
-// delete expired cache
-$expireTime = floor($time - $delay);
-foreach (array_reverse($cache,true) as $k => $e) {
-    if ($e[0] < $expireTime) {
-        unset($cache[$k]);
-    } else {
-        break;
-    }
-}
-
-if ($isApc) {
-    apc_store('chat', $cache);
-} else {
-    file_put_contents($tmpFile, serialize($cache));
-}
-
 /* end semafore */
 flock($fh, LOCK_UN);
 fclose($fh);
diff --git a/sources/server.php b/sources/server.php
index c8820e4..4db348d 100644
--- a/sources/server.php
+++ b/sources/server.php
@@ -1,79 +1,26 @@
 <?php
 
-function v($v, $czyscHtmlIExit = false) {
-	if ($czyscHtmlIExit) ob_end_clean();
-    echo '<pre>' . print_r($v, true) . '</pre>';
-	if ($czyscHtmlIExit) exit;
-}
-function vv($v, $czyscHtmlIExit = false) {
-	if ($czyscHtmlIExit) ob_end_clean();
-    echo '<pre>';
-	var_dump($v);
-	echo '</pre>';
-	if ($czyscHtmlIExit) exit;
-}
-function vvv($var, & $result = null, $is_view = true)
-{
-    if (is_array($var) || is_object($var)) foreach ($var as $key=> $value) vvv($value, $result[$key], false);
-    else $result = $var;
+$pos = isset($_REQUEST['pos']) ? $_REQUEST['pos'] : '';
+$lastdate = isset($_REQUEST['lastdate']) ? $_REQUEST['lastdate'] : '';
+$room = isset($_REQUEST['room']) ? $_REQUEST['room'] : '';
+$date = date('Y-m-d');
+$file = './history/'.$room.$date;
 
-    if ($is_view) v($result);
-}
+if (!ctype_digit($pos) || !file_exists($file)) return;
 
-$id = isset($_POST['id']) ? $_POST['id'] : '';
-$room = isset($_POST['room']) ? $_POST['room'] : '';
+settype($pos, "integer");
+settype($lastdate, "integer");
 
-if ($id === '' ) return;
+if ($date!=date('Y-m-d',$lastdate)) $pos=0;
 
-$isApc = extension_loaded('apc');
-$cache = $isApc ? apc_fetch('chat') : @unserialize(file_get_contents('./history/'.$room.'cache2100-01-01'));
 $data = array();
-if ($id === 'undefined') {
-    $id = empty($cache) ? 0 : $cache[0][0];
-// first refresh : loads 50 last msg from history    
-    $file = './history/'.$room.date('Y-m-d');
-    if (file_exists($file)) { 
-      $history = file($file, FILE_IGNORE_NEW_LINES);
-      $history = array_reverse($history);
-      foreach ($history as & $ref) {
-          $ref = explode('>', $ref);
-      }
-      $data = array_slice($history, 0, 50);
-    }  
-} elseif ($id === '0') {
-    if (!empty($cache)) {
-        $id = $cache[0][0];
-        $data = $cache;
-    }
-} else {
-    $end = end($cache);
-    // read data from cache
-    if ($id >= $end[0]) {
-        foreach ($cache as $k => $c) {
-            if ($c[0] === $id) break;
-        }
-        $data = array_slice($cache, 0, $k);
-    }
-    // read data from history (any problem witch Internet and are delays)
-    else {
-        $date = date('Y-m-d');
-        $history = array();
-        while (($history = array_merge(file('./history/'.$room.$date, FILE_IGNORE_NEW_LINES), $history)) && $history[0] > $id) {
-            $date = date('Y-m-d', strtotime('-1 day', strtotime($date)));
-            if (!file_exists('./history/'.$room.$date)) break;
-        }
-        // prepare history
-        $history = array_reverse($history);
-        foreach ($history as & $ref) {
-            $ref = explode('>', $ref);
-        }
-        // get data
-        foreach ($history as $k => $h) {
-            if ($h[0] === $id) break;
-        }
-        $data = array_slice($history, 0, $k);
-    }
-    $id = $cache[0][0];
+$fh =fopen($file, "r");
+
+if (fseek($fh, $pos)==0) {
+  $i=0;
+  while($lig=fgets($fh)){ $data[$i++] = explode('>', $lig); }
+  $pos =ftell($fh);
+  echo json_encode(array('pos' => $pos, 'data' => $data));
 }
 
-echo json_encode(array('id' => $id, 'data' => $data));
+?>
\ No newline at end of file
diff --git a/sources/setup.ini b/sources/setup.ini
deleted file mode 100644
index 333ba18..0000000
--- a/sources/setup.ini
+++ /dev/null
@@ -1,9 +0,0 @@
-
-; how often get data from serwer
-interval = 2500 ; in milliseconds
-
-; extra time for cache when is problem with Internet
-expire_cache = 60 ; in seconds
-
-; time for history
-expire_history = 1 ; in days
diff --git a/sources/style.css b/sources/style.css
index 5790d10..fcd659a 100644
--- a/sources/style.css
+++ b/sources/style.css
@@ -69,8 +69,6 @@ a:hover { text-decoration: underline; }
 
 .logout { float: right; }
 
-.msgln { margin:0 0 2px 0; }
-
 .tform  { display: table;      }
 .tform p     { display: table-row;  }
 .tform label { display: table-cell; }