diff --git a/about.php b/about.php
index 4d83fe8..7b5ba3c 100644
--- a/about.php
+++ b/about.php
@@ -23,6 +23,9 @@
 
   <script>
     $(document).ready(function(){
+
+      getMyAdressInfos();
+
       $('#myNavbar').on('show.bs.collapse', function () {
         $('#logo_topisto').css({'height' : '30px','width' : '30px'});
         $('#titre_topisto').css({'font-size' : '30px'});
@@ -66,6 +69,29 @@
       });
     });
 
+    /*
+     * Récupéer les taux de change actuels
+     *    https://blockchain.info/ticker?cors=true
+     *  
+     * Récupéer la balance de mon adresse
+     *    https://blockchain.info/q/addressbalance/15V7XfBX2Xn5uKpK3VuVngDg44TSKLtTSh?cors=true
+     * 
+     * Calculer et afficher la balance en EUR et USD
+     *
+     */
+    function getMyAdressInfos() {
+      var balance_url = 'https://blockchain.info/q/addressbalance/15V7XfBX2Xn5uKpK3VuVngDg44TSKLtTSh?cors=true';
+      $.get( balance_url, function( data ) {
+        var balance = data/100000000;
+        var btc_change = 'balance : ' + balance + ' &#8383';
+        $.getJSON( 'https://blockchain.info/ticker?cors=true', function( data ) {
+          btc_change += ' / '+ Math.round(data.USD['15m']*balance) + ' $';
+          btc_change += ' / '+ Math.round(data.EUR['15m']*balance) + ' €';
+          $('#BTC_CHANGE').html(btc_change);
+        });
+      });
+     }
+
   </script>
 
 </head>
@@ -94,10 +120,18 @@
   </div>
 </nav>
 
+<div id="explorer" class="container-fluid bg-grey" style="padding-bottom:10px">
+  <div class="row">
+    <div class="col-sm-12 text-left">
+      <br>BTC adress : <a href="https://www.blockchain.com/btc/address/15V7XfBX2Xn5uKpK3VuVngDg44TSKLtTSh">15V7XfBX2Xn5uKpK3VuVngDg44TSKLtTSh</a>
+      <br><div id="BTC_CHANGE">&nbsp; &#8383 - &nbsp; $ - &nbsp; €</div>
+    </div>
+  </div>
+</div>
+
 <div id="about" class="container-fluid">
   <div class="row">
     <div class="col-sm-8">
-      <br><br><br>
       <h4>This site is a hobby.<br>It's also a testing place where i can do <a href="blog.php">things</a> that are impossible at work.</h4>
       <p class="text-justify">I like <b>surfing</b> and sailing on the ocean. But during longs winter nights, computing is fun. I'm interested into <b>cryptocurrencies</b>, computationnal art, datavisualisation. I know that <b>42</b> is the answer to <b>the Life, Universe and Everything Else</b>. As <b>Eto Demerzel</b> said to me, the <b>Seldon's Plan</b> will save the Galaxy. My favorites books are the <b>House of leaves</b>, the <b>Necronomicron</b> and the <b>DarkHold</b>. I also know that <b>great power comes with great responsibility</b>. I'm still in <b>the search of Captain Zero</b>, because <b>the Truth is out there</b>.</p>
     </div>
diff --git a/index.php b/index.php
index 4d4421a..e539d1d 100644
--- a/index.php
+++ b/index.php
@@ -37,14 +37,13 @@
           var pos = $(this).offset().top;
           var winTop = $(window).scrollTop();
           if (pos < winTop + 600) {
-            blockchainExplorer.ajouterPreviousBlock();
+            blockchainExplorer.addBottomBlock();
             $(this).addClass("slide");
           }
         });
       });
 
       blockchainExplorer.init(1);
-
     });
 
     function showInfos(element)
diff --git a/js/blockexplorer copy.js b/js/blockexplorer copy.js
new file mode 100644
index 0000000..e117915
--- /dev/null
+++ b/js/blockexplorer copy.js	
@@ -0,0 +1,331 @@
+blockchainExplorer = function(){
+
+  // Init array
+  var liste_blocks   = null;
+  var flag_nav       = true;
+  var classes        = ['bg-grey-even','bg-grey-odd'];
+  var cur_class      = 0;
+  var cur_height     = [];
+  var cur_methode    = 'hasard';
+  var isInitSelector = false;
+  var _mode          = 1;
+
+  function _precisionRound(number) {
+      var precision = 4;
+      var factor = Math.pow(10, precision);
+      return Math.round((number/100000000) * factor) / factor;
+  }
+
+  function _getblockNameFromHash(hash)
+  {
+    var retour = '';
+    if (liste_blocks != null)
+      liste_blocks.forEach(function(item){
+        if (hash == item.hash) retour = item.name;
+      });
+    return retour;
+  }
+
+  function _getblocHashFromName(name)
+  {
+    var retour = '';
+    liste_blocks.forEach(function(item){
+      if (name == item.name) retour = item.hash;
+    });
+    return retour;
+  }
+
+  function _addInfoForBlock(block)
+  {
+    var contenu = '';
+    var downloadingImage = new Image();
+
+    cur_height.push(block.height);
+    
+    cur_class  = 1 - cur_class;
+
+    blockName = _getblockNameFromHash(block.hash);
+    if (blockName != '') blockName = ' ( '+blockName+' )';
+      
+    contenu += '      <div style="height:220px;width:100%;display:block;position:absolute">';
+    if (_mode != 0)
+    {
+      contenu += '<div style="color:black;opacity:1.0;margin-right:30px">';
+      // contenu += '      <h2> <span style="font-size:12px">block</span> '+block.height+blockName+'</h2>';
+      //contenu += '<span style="font-size:4px">&nbsp;</span>';
+      contenu += '      <table width="100%" style="margin-top:3px">';
+      //contenu += '       <tr><td>hash</td><td align="right"><b>'+block.hash+'</b></td></tr>';
+      //contenu += '       <tr><td>index</td><td align="right"><b>'+block.block_index+'</b></td></tr>';
+      contenu += '        <tr><td>height</td><td align="right"><b>'+block.height+'</b></td></tr>';
+      contenu += '        <tr><td>timestamp</td><td align="right"><b>'+block.time+'</b></td></tr>';
+      contenu += '        <tr><td>nonce</td><td align="right"><b>'+block.nonce+'</b></td></tr>';
+      contenu += '        <tr><td>nb tx</td><td align="right"><b>'+block.n_tx+'</b></td></tr>';
+      contenu += '        <tr><td>outputs</td><td align="right"><b>'+_precisionRound(block.topisto_outputs).toFixed(4)+'</b></td></tr>';
+      contenu += '        <tr><td>inputs</td><td align="right"><b>'+_precisionRound(block.topisto_inputs).toFixed(4)+'</b></td></tr>';
+      contenu += '        <tr><td>fees</td><td align="right"><b>'+_precisionRound(block.topisto_fees).toFixed(4)+'</b></td></tr>';
+      contenu += '        <tr><td>reward</td><td align="right"><b>'+_precisionRound(block.topisto_reward).toFixed(4)+'</b></td></tr>';
+      contenu += '      </table>';
+      contenu += '</div>';
+    }
+    contenu += '      </div>';
+
+    $('#info_'+block.height).html(contenu);
+
+    contenu = '';
+    contenu += '<div id="img_'+block.height+'" style="';
+    contenu += 'height:220px;';
+    contenu += 'content: "";';
+    contenu += 'top: 0;';
+    contenu += 'left: 0;';
+    contenu += 'bottom: 0;';
+    contenu += 'right: 0;';
+    contenu += 'position: relative;';
+    contenu += 'z-index: -1;   ';
+    contenu += '"></div>'
+
+    $('#info_'+block.height).append(contenu);
+
+    downloadingImage.onload = function(){
+
+      // $('#img_'+block.height).attr('src', this.src);   
+/*
+      $('#img_'+block.height).attr('height', _height);
+      $('#img_'+block.height).attr('width','auto');
+*/
+
+      var div0 = document.getElementById('img_'+block.height);
+
+      div0.style.backgroundImage = "url(" + this.src + ")";
+      div0.style.backgroundRepeat = "no-repeat";
+      div0.style.backgroundPosition = "center";
+      div0.style.backgroundSize = "auto 100%";
+      if (_mode==1) div0.style.opacity=0.3;
+
+      flag_nav = true;
+
+      if (liste_blocks.length % 20)
+        _gotoBlock(block.prev);
+
+    };
+    downloadingImage.src = 'images/block_image.php?methode='+cur_methode+'&hash='+block.hash;
+
+    return true;
+  }
+
+  function _addDiv(block_height)
+  {
+    var contenu = '';
+
+    contenu += '<div id="block_'+block_height+'" class="container-fluid '+classes[cur_class]+'">';
+    contenu += '  <div class="row">';
+    contenu += '###BLOCK_DESC###';
+    contenu += '  </div>';
+    contenu += '</div>';
+
+    return contenu;
+  }
+
+  function _addDivForBlock(block_height, onTop = false)
+  {
+    var tmp;
+    var contenu = _addDiv(block_height);
+    var block_desc = '';
+
+    block_desc += '    <div class="col-sm-12" id="info_'+block_height+'">';
+    block_desc += '      <h2>BLOCK '+block_height+' ...</h2>';
+    block_desc += '    </div>';
+
+    tmp = contenu.replace('###BLOCK_DESC###',block_desc);
+
+    if (onTop) {
+      tmp += $('#blockchain').html();
+      $('#blockchain').html(tmp);
+    } else {
+      $('#blockchain').append(tmp);
+    }
+    return true;
+  }
+
+  function _addDivForVoid()
+  {
+    return _addDivForBlock('void');
+  }
+
+  function _toggleForwardBtn()
+  {
+    if (cur_height.length < 3)
+    {
+      $('#fast_forward_btn').removeClass('btn-success');
+      $('#fast_forward_btn').addClass('btn-secondary');
+      $('#btn-forward').removeClass('btn-info');
+      $('#btn-forward').addClass('btn-secondary');
+    } else {
+      $('#fast_forward_btn').removeClass('btn-secondary');
+      $('#fast_forward_btn').addClass('btn-success');
+      $('#btn-forward').removeClass('btn-secondary');
+      $('#btn-forward').addClass('btn-info');
+    }
+    return true;      
+  }
+
+  function _gotoBlock(block_name)
+  {
+    $(document).scrollTop( $("#explorer").offset().top );
+    // Bloquer la navigation pendant le calcul
+    if (!flag_nav)
+    {
+      window.alert('A block image is currently computed, please wait ...');
+      return false;
+    }
+    flag_nav   = false;
+
+    if (block_name == 'NEXT')
+    {
+      flag_nav   = true;
+
+      // Supprimer un block
+      if (cur_height.length < 3)
+      {
+        window.alert('No Next Block, you are at '+$('#blockSelector').val()+' block !');
+        return false;
+      }
+
+      liste_blocks['PREVIOUS'] = liste_blocks['BLOCK_'+cur_height[cur_height.length-1]];
+      cur_height.pop();
+        
+      _toggleForwardBtn();
+
+      $('#block_'+cur_height[cur_height.length-2]).slideDown(400, function() {
+        // Animation complete.
+        $('#blockchain').children('div:last').remove();
+        cur_class = 1 - cur_class;
+      });
+
+    } else {
+      // Ajouter un block
+      _addDivForBlock(cur_height[cur_height.length-1] - 1);
+
+      // Décaler d'un block vers le haut
+      if (cur_height.length > 1) $('#block_'+cur_height[cur_height.length-2]).slideUp();
+
+      block_hash = '';
+      if (block_name != 'LAST') block_hash = '?block_hash='+liste_blocks[block_name];
+      $.getJSON('data/getBlockInfo.php'+block_hash, function( data ) {
+        liste_blocks['PREVIOUS'] = data.prev;
+        liste_blocks['BLOCK_'+data.height] = data.hash;
+        _addInfoForBlock(data);
+
+        _toggleForwardBtn();
+      });
+    }
+
+    return true;
+  }
+
+  function _ajouterTopBlock(data, flag)
+  {
+    if (flag) return "ajouterTopBlock";
+
+    // Bloquer la navigation pendant le calcul
+    if (!flag_nav) return false;
+    flag_nav = false;
+
+    // Ajouter un div
+    _addDivForBlock(data.height,true);
+    
+    // Décaler le tableau cur_height par le haut
+    cur_height.unshift(data.height);
+
+    // Maintenir la liste des blocks
+    liste_blocks['BLOCK_'+data.height] = data.hash;
+
+    // Mettre les infos dans le div
+    _addInfoForBlock(data);
+  }
+
+  function _ajouterPreviousBlock()
+  {
+    // Bloquer la navigation pendant le calcul
+    if (!flag_nav) return false;
+    flag_nav = false;
+
+    // Ajouter un div
+    _addDivForBlock(cur_height[cur_height.length-1] - 1);
+    
+    // Mettre les infos du block
+    block_hash = '?block_hash='+liste_blocks['PREVIOUS'];
+    $.getJSON('data/getBlockInfo.php'+block_hash, function( data ) {
+      liste_blocks['PREVIOUS'] = data.prev;
+      liste_blocks['BLOCK_'+data.height] = data.hash;
+      _addInfoForBlock(data);
+    });
+  }
+
+  function _initBlockchain(block_name)
+  {
+    $(document).scrollTop( $("#explorer").offset().top );
+    $('#blockchain').html('');
+    cur_height = [];
+    cur_class  = 0;
+    flag_nav   = true;
+
+    block_hash = '';
+    if (block_name != 'LAST') block_hash = '?block_hash='+_getblocHashFromName(block_name);
+    $.getJSON('data/getBlockInfo.php'+block_hash, function( data ) {
+      _addDivForBlock(data.height);        
+      _addInfoForBlock(data);
+
+      liste_blocks['PREVIOUS'] = data.prev;
+      if (data.prev != '0000000000000000000000000000000000000000000000000000000000000000')
+        _gotoBlock('PREVIOUS');
+      else 
+        _addDivForVoid();
+    });
+
+    return true;
+  }
+
+  function _blockSelectorChange()
+  {
+    _initBlockchain($('#blockSelector').val());
+    $('#fast_forward_btn').attr('data-original-title', $('#blockSelector').val());
+  }
+
+  function _initBlockSelector()
+  {
+    if (!isInitSelector)
+    {
+      // Init the selector
+      var select = $('#blockSelector');
+      
+      $.each(liste_blocks, function (key, bloc) {
+        select.append(new Option(bloc.name, bloc.name));
+      });
+
+      isInitSelector = true;
+    }
+  }
+
+  function _init(mode = 1)
+  {
+    _mode = mode;
+    cur_height     = [];
+
+    $.getJSON('data/getKnownBlocksList.php', function( data ) {
+      liste_blocks = data;
+      _initBlockSelector();
+      if (cur_height.length == 0) _initBlockchain('LAST');
+      return true;
+    });
+  }
+
+  return {
+
+    ajouterTopBlock: _ajouterTopBlock,
+    ajouterPreviousBlock: _ajouterPreviousBlock,
+    getblocHashFromName: _getblocHashFromName,
+    ajouterTopBlock : _ajouterTopBlock,
+
+    init: _init
+  };
+}();
diff --git a/js/blockexplorer.js b/js/blockexplorer.js
index a1529b0..56b0995 100644
--- a/js/blockexplorer.js
+++ b/js/blockexplorer.js
@@ -1,13 +1,11 @@
 blockchainExplorer = function(){
 
   // Init array
-  var liste_blocks   = null;
-  var flag_nav       = true;
-  var classes        = ['bg-grey-even','bg-grey-odd'];
-  var cur_class      = 0;
-  var cur_height     = [];
-  var cur_methode    = 'hasard';
-  var isInitSelector = false;
+  var _known_blocks   = null;
+  var _liste_blocks   = null;
+  var _classes        = ['bg-grey-even','bg-grey-odd'];
+  var _cur_class      = 0;
+  var _cur_methode    = 'hasard';
   var _mode          = 1;
 
   function _precisionRound(number) {
@@ -19,8 +17,8 @@ blockchainExplorer = function(){
   function _getblockNameFromHash(hash)
   {
     var retour = '';
-    if (liste_blocks != null)
-      liste_blocks.forEach(function(item){
+    if (_liste_blocks != null)
+      _liste_blocks.forEach(function(item){
         if (hash == item.hash) retour = item.name;
       });
     return retour;
@@ -29,7 +27,7 @@ blockchainExplorer = function(){
   function _getblocHashFromName(name)
   {
     var retour = '';
-    liste_blocks.forEach(function(item){
+    _liste_blocks.forEach(function(item){
       if (name == item.name) retour = item.hash;
     });
     return retour;
@@ -40,9 +38,7 @@ blockchainExplorer = function(){
     var contenu = '';
     var downloadingImage = new Image();
 
-    cur_height.push(block.height);
-    
-    cur_class  = 1 - cur_class;
+    _cur_class  = 1 - _cur_class;
 
     blockName = _getblockNameFromHash(block.hash);
     if (blockName != '') blockName = ' ( '+blockName+' )';
@@ -102,8 +98,9 @@ blockchainExplorer = function(){
       if (_mode==1) div0.style.opacity=0.3;
 
       flag_nav = true;
+
     };
-    downloadingImage.src = 'images/block_image.php?methode='+cur_methode+'&hash='+block.hash;
+    downloadingImage.src = 'images/block_image.php?methode='+_cur_methode+'&hash='+block.hash;
 
     return true;
   }
@@ -112,7 +109,7 @@ blockchainExplorer = function(){
   {
     var contenu = '';
 
-    contenu += '<div id="block_'+block_height+'" class="container-fluid '+classes[cur_class]+'">';
+    contenu += '<div id="block_'+block_height+'" class="container-fluid '+_classes[_cur_class]+'">';
     contenu += '  <div class="row">';
     contenu += '###BLOCK_DESC###';
     contenu += '  </div>';
@@ -123,6 +120,7 @@ blockchainExplorer = function(){
 
   function _addDivForBlock(block_height, onTop = false)
   {
+    var tmp;
     var contenu = _addDiv(block_height);
     var block_desc = '';
 
@@ -130,12 +128,13 @@ blockchainExplorer = function(){
     block_desc += '      <h2>BLOCK '+block_height+' ...</h2>';
     block_desc += '    </div>';
 
+    tmp = contenu.replace('###BLOCK_DESC###',block_desc)
+
     if (onTop) {
-      tmp = contenu.replace('###BLOCK_DESC###',block_desc)
       tmp += $('#blockchain').html();
       $('#blockchain').html(tmp);
     } else {
-      $('#blockchain').append(contenu.replace('###BLOCK_DESC###',block_desc));
+      $('#blockchain').append(tmp);
     }
     return true;
   }
@@ -145,23 +144,6 @@ blockchainExplorer = function(){
     return _addDivForBlock('void');
   }
 
-  function _toggleForwardBtn()
-  {
-    if (cur_height.length < 3)
-    {
-      $('#fast_forward_btn').removeClass('btn-success');
-      $('#fast_forward_btn').addClass('btn-secondary');
-      $('#btn-forward').removeClass('btn-info');
-      $('#btn-forward').addClass('btn-secondary');
-    } else {
-      $('#fast_forward_btn').removeClass('btn-secondary');
-      $('#fast_forward_btn').addClass('btn-success');
-      $('#btn-forward').removeClass('btn-secondary');
-      $('#btn-forward').addClass('btn-info');
-    }
-    return true;      
-  }
-
   function _gotoBlock(block_name)
   {
     $(document).scrollTop( $("#explorer").offset().top );
@@ -184,7 +166,7 @@ blockchainExplorer = function(){
         return false;
       }
 
-      liste_blocks['PREVIOUS'] = liste_blocks['BLOCK_'+cur_height[cur_height.length-1]];
+      _liste_blocks['PREVIOUS'] = _liste_blocks['BLOCK_'+cur_height[cur_height.length-1]];
       cur_height.pop();
         
       _toggleForwardBtn();
@@ -192,7 +174,7 @@ blockchainExplorer = function(){
       $('#block_'+cur_height[cur_height.length-2]).slideDown(400, function() {
         // Animation complete.
         $('#blockchain').children('div:last').remove();
-        cur_class = 1 - cur_class;
+        _cur_class = 1 - _cur_class;
       });
 
     } else {
@@ -203,10 +185,10 @@ blockchainExplorer = function(){
       if (cur_height.length > 1) $('#block_'+cur_height[cur_height.length-2]).slideUp();
 
       block_hash = '';
-      if (block_name != 'LAST') block_hash = '?block_hash='+liste_blocks[block_name];
+      if (block_name != 'LAST') block_hash = '?block_hash='+_liste_blocks[block_name];
       $.getJSON('data/getBlockInfo.php'+block_hash, function( data ) {
-        liste_blocks['PREVIOUS'] = data.prev;
-        liste_blocks['BLOCK_'+data.height] = data.hash;
+        _liste_blocks['PREVIOUS'] = data.prev;
+        _liste_blocks['BLOCK_'+data.height] = data.hash;
         _addInfoForBlock(data);
 
         _toggleForwardBtn();
@@ -216,67 +198,63 @@ blockchainExplorer = function(){
     return true;
   }
 
-  function _ajouterTopBlock(data)
+  function _addTopBlock(data, flag = false)
   {
-    // Bloquer la navigation pendant le calcul
-    if (!flag_nav) return false;
-    flag_nav = false;
+    if (flag) return "ajouterTopBlock";
+
+    // Maintenir la liste des blocks
+    _liste_blocks['TOP'] = data.hash;
+    _liste_blocks['BLOCK_'+data.height] = data.hash;
 
     // Ajouter un div
     _addDivForBlock(data.height,true);
     
     // Mettre les infos dans le div
-     _addInfoForBlock(data);
-
-    // Décaler le tableau cur_height par le haut
-    cur_height.unshift(data.height);
-
-    // Maintenir la liste des blocks
-    liste_blocks['BLOCK_'+data.height] = data.hash;
+    _addInfoForBlock(data);
   }
 
-  function _ajouterPreviousBlock()
-  {
-    // Bloquer la navigation pendant le calcul
-    if (!flag_nav) return false;
-    flag_nav = false;
+  function _addBottomBlock()
+  {   
+    // Mettre les infos du block
+    block_hash = '?block_hash='+_liste_blocks['BOTTOM'];
+    $.getJSON('data/getBlockInfo.php'+block_hash, function( data ) {
 
-    // Ajouter un div
-    _addDivForBlock(cur_height[cur_height.length-1] - 1);
+      _liste_blocks['BOTTOM'] = data.prev;
+      _liste_blocks['BLOCK_'+data.height] = data.hash;
+      _liste_blocks['LENGTH'] += 1;
+
+      // Ajouter un div
+      _addDivForBlock(data.height, false);
     
-    // Mettre les infos du
-    block_hash = '?block_hash='+liste_blocks['PREVIOUS'];
-    $.getJSON('data/getBlockInfo.php'+block_hash, function( data ) {
-      liste_blocks['PREVIOUS'] = data.prev;
-      liste_blocks['BLOCK_'+data.height] = data.hash;
+      // Mettre les infos dans le div
       _addInfoForBlock(data);
+
+      // Récursivité pour précharger par paquets
+      if (_liste_blocks['LENGTH'] % 10) _addBottomBlock();
     });
   }
 
   function _initBlockchain(block_name)
   {
+    var block_hash = '';
+
     $(document).scrollTop( $("#explorer").offset().top );
     $('#blockchain').html('');
-    cur_height = [];
-    cur_class  = 0;
-    flag_nav   = true;
 
-    block_hash = '';
     if (block_name != 'LAST') block_hash = '?block_hash='+_getblocHashFromName(block_name);
     $.getJSON('data/getBlockInfo.php'+block_hash, function( data ) {
+
+      _liste_blocks['BOTTOM'] = data.prev;
+      _liste_blocks['TOP'] = data.hash;
+      _liste_blocks['BLOCK_'+data.height] = data.hash;
+      _liste_blocks['LENGTH'] += 1;
+
       _addDivForBlock(data.height);        
       _addInfoForBlock(data);
 
-      liste_blocks['PREVIOUS'] = data.prev;
-      if (data.prev != '0000000000000000000000000000000000000000000000000000000000000000')
-        _gotoBlock('PREVIOUS');
-      else 
-        _addDivForVoid();
-      
-      // Ajouter le trigger sur les nouveaux blocks
-      if (block_name == 'LAST') 
-        blockchainListener.addBlockHook(_ajouterTopBlock);
+      blockchainListener.addBlockHook(_addTopBlock);
 
+      _addBottomBlock();
     });
 
     return true;
@@ -285,42 +263,47 @@ blockchainExplorer = function(){
   function _blockSelectorChange()
   {
     _initBlockchain($('#blockSelector').val());
-    $('#fast_forward_btn').attr('data-original-title', $('#blockSelector').val());
   }
 
   function _initBlockSelector()
   {
-    if (!isInitSelector)
-    {
-      // Init the selector
-      var select = $('#blockSelector');
+    // Init the selector
+    var select = $('#blockSelector');
       
-      $.each(liste_blocks, function (key, bloc) {
-        select.append(new Option(bloc.name, bloc.name));
-      });
-
-      isInitSelector = true;
-    }
+    $.each(_liste_blocks, function (key, bloc) {
+      select.append(new Option(bloc.name, bloc.name));
+    });
   }
 
   function _init(mode = 1)
   {
     _mode = mode;
-    cur_height     = [];
+    if (_known_blocks == null)
+    {
+      $.getJSON('data/getKnownBlocksList.php', function( data ) {
+        _liste_blocks = [];
+        _liste_blocks['LENGTH'] = 0;
 
-    $.getJSON('data/getKnownBlocksList.php', function( data ) {
-      liste_blocks =  data;
-      _initBlockSelector();
-      if (cur_height.length == 0) _initBlockchain('LAST');
-      return true;
-    });
+        _known_blocks = data;
+        _known_blocks.sort(function(a,b){
+          // sort desc ...
+          if (a.height < b.height) return 1;
+          if (a.height > b.height) return -1;
+          return 0;
+        });
+
+        _initBlockchain('LAST');
+
+        return true;
+      });
+    }
   }
 
   return {
 
-    ajouterPreviousBlock: _ajouterPreviousBlock,
+    addTopBlock: _addTopBlock,
+    addBottomBlock: _addBottomBlock,
     getblocHashFromName: _getblocHashFromName,
-    ajouterTopBlock : _ajouterTopBlock,
 
     init: _init
   };
diff --git a/js/lastblock.js b/js/lastblock.js
index e33fa29..1e6145f 100644
--- a/js/lastblock.js
+++ b/js/lastblock.js
@@ -9,10 +9,10 @@ blockchainListener = function(){
   var _last_block       = null;
   var _last_block_hooks = [];
   
-  function _logBlockHash(leblock)
+  function _logBlockHash(leblock, flag)
   {
+    if (flag) return "logBlockHash";
     console.log('Last Block detected : '+leblock.hash);
-    return true;
   };
 
   function _isBlockNew(leblock)
@@ -20,34 +20,43 @@ blockchainListener = function(){
     return ((_last_block == null)||(_last_block.hash != leblock.hash));
   };
   
-  function _getLastBlockInfo()
+  function _lastBlockTrigger()
   {
     $.get( "data/getBlockInfo.php", function( data ) {
       if (_last_block_hooks.length > 0)
       {
         if (_isBlockNew(data))
-        {           
+        {
+          if (_last_block = data != null)
+          {
+            _last_block_hooks.forEach(function(trigger) {
+              if (trigger instanceof Function) trigger(data);
+            });
+          }
           _last_block = data;
-          _last_block_hooks.forEach(function(trigger) {
-            if (trigger instanceof Function)
-              trigger(data);
-            else
-              console.log(trigger);
-          });
         } 
       }
     }, "json" );
 
-    setTimeout(_getLastBlockInfo, 30000);
+    setTimeout(_lastBlockTrigger, 30000);
   };
 
   function _addBlockHook(addBlockHook){
-    _last_block_hooks.push(addBlockHook);
+    var hookname = addBlockHook(null, true);
+    var flag_add = true;
+    _last_block_hooks.forEach(function(trigger) {
+      if (trigger instanceof Function)
+      {
+        var local_hookname = trigger(null, true);
+        flag_add = flag_add && (local_hookname == hookname);
+      }
+    });    
+    if (flag_add) _last_block_hooks.push(addBlockHook);
   };
 
   function _init(){
-    _last_block_hooks.push(_logBlockHash);
-    _getLastBlockInfo();
+    _addBlockHook(_logBlockHash);
+    _lastBlockTrigger();
   };
 
   return {init: _init, addBlockHook: _addBlockHook};