diff --git a/sai/modules/saimod_sys_error/sai_sys_error.js b/sai/modules/saimod_sys_error/sai_sys_error.js
new file mode 100644
index 0000000..283eeab
--- /dev/null
+++ b/sai/modules/saimod_sys_error/sai_sys_error.js
@@ -0,0 +1,44 @@
+function init__SYSTEM_SAI_saimod_sys_error() {  
+    
+    
+    $('#truncate_table').click(function(){
+        
+        $.ajax({
+            type :'GET',
+            //url  : './system/sai/modules/saimod_sys_error/saimod_sys_error.php',
+            data :{truncate : 'sys_log'},
+            success : function(data) {
+                if(data === true){
+                    
+                    
+                    $('#truncate_modal').modal('hide');
+                    //location.reload(true);
+                }else{
+                    //location.reload(true);
+                    $('#truncate_modal').modal('hide');
+                    //you don't have the permission to truncate table
+                }
+                
+           }
+        });
+    });
+    
+    
+    $('#refresh_error_table').click(function(){
+        
+        $('img#loader').show();
+        
+        
+        setTimeout($('img#loader').hide(), 3000);
+            //TODO: reload error msgs....
+        
+        
+        
+        
+    })
+        
+
+    
+    
+    
+}
\ No newline at end of file
diff --git a/sai/modules/saimod_sys_error/saimod_sys_error.php b/sai/modules/saimod_sys_error/saimod_sys_error.php
index b4b45ae..5a1e604 100644
--- a/sai/modules/saimod_sys_error/saimod_sys_error.php
+++ b/sai/modules/saimod_sys_error/saimod_sys_error.php
@@ -2,7 +2,20 @@
 
 namespace SYSTEM\SAI;
 
+
 class saimod_sys_error extends \SYSTEM\SAI\SaiModule {    
+    public static function truncate_sys_log(){
+        if(\SYSTEM\SECURITY\Security::check(\SYSTEM\system::getSystemDBInfo(), \SYSTEM\SECURITY\RIGHTS::SYS_SAI)){
+            $con = new \SYSTEM\DB\Connection(\SYSTEM\system::getSystemDBInfo());
+            $res = $con->query('TRUNCATE system.sys_log;');
+
+            return true;
+        }else{
+            return false;
+        }
+    }
+    
+    
     public static function html_content(){
         $con = new \SYSTEM\DB\Connection(\SYSTEM\system::getSystemDBInfo());
         $res = $con->query('SELECT * FROM system.sys_log ORDER BY time DESC LIMIT 100;');
@@ -10,7 +23,26 @@ class saimod_sys_error extends \SYSTEM\SAI\SaiModule {
         
         $now = microtime(true);
         
-        $result =   '<table class="table table-hover table-condensed" style="overflow: auto;">'.                    
+        $result = '<div id="truncate_modal" class="modal hide fade">
+                    <div class="modal-header">
+                      <button type="button" class="close" data-dismiss="modal" aria-hidden="true">&times;</button>
+                      <h3>Truncate table system.sys_log</h3>
+                    </div>
+                    <div class="modal-body">
+                      <p>This action will delete all error messages from databse. <br />
+                         Are you sure?</p>
+                    </div>
+                    <div class="modal-footer">
+                      <a href="#" class="btn" data-dismiss="modal">Cancel</a>
+                      <a href="#" class="btn btn-danger" id="truncate_table">Yes, delete all!</a>
+                    </div>
+                  </div>            
+                  <button href="#refresh_error_table" class="btn" style="height: 32px; font-size: 13px;">Refresh</button>
+                  <button data-toggle="modal" href="#truncate_modal" class="btn" style="height: 32px; font-size: 13px; float: right;">Truncate Table</button>
+                  <img id="loader" src="dasense/page/default_developer/img/ajax-loader.gif" style="margin-left: 10px;">
+                  <br /><br />';
+        
+        $result .=   '<table class="table table-hover table-condensed" style="overflow: auto;">'.                    
                     '<tr>'.'<th>'.'time ago in sec'.'</th>'.'<th>'.'time'.'</th>'.'<th>'.'class'.'</th>'.'<th>'.'message'.'</th>'.'<th>'.'code'.'</th>'.'<th>'.'file'.'</th>'.'<th>'.'line'.'</th>'.'<th>'.'ip'.'</th>'.'<th>'.'querytime'.'</tr>';
         while($r = $res->next()){
             $result .= '<tr class="'.self::tablerow_class($r['class']).'">'.'<td>'.(int)($now - strtotime($r['time'])).'</td>'.'<td>'.$r['time'].'</td>'.'<td>'.$r['class'].'</td>'.'<td>'.$r['message'].'</td>'.'<td>'.$r['code'].'</td>'.'<td>'.$r['file'].'</td>'.'<td>'.$r['line'].'</td>'.'<td>'.$r['ip'].'</td>'.'<td>'.$r['querytime'].'</tr>';
@@ -40,5 +72,6 @@ class saimod_sys_error extends \SYSTEM\SAI\SaiModule {
     public static function right_right(){return \SYSTEM\SECURITY\Security::check(\SYSTEM\system::getSystemDBInfo(), \SYSTEM\SECURITY\RIGHTS::SYS_SAI);}
     
     public static function src_css(){}
-    public static function src_js(){}
+    public static function src_js(){return \SYSTEM\LOG\JsonResult::toString(
+                                    array(  \SYSTEM\WEBPATH(new \SYSTEM\PSAI(),'modules/saimod_sys_error/sai_sys_error.js')));}
 }
\ No newline at end of file
diff --git a/sai/page/default_page/sai.tpl b/sai/page/default_page/sai.tpl
index 23edeef..c061f51 100644
--- a/sai/page/default_page/sai.tpl
+++ b/sai/page/default_page/sai.tpl
@@ -22,7 +22,7 @@
          </div>
      </div>
 
-     <div id="project_navbar" style="width:150px;float:left;">
+     <div id="project_navbar" style="width:210px;float:left;">
         <div class="navbar-inner">          
             <ul class="nav nav-list">                
                 ${menu_proj}