diff --git a/js/blockexplorer.js b/js/blockexplorer.js
index 56b0995..6d18b14 100644
--- a/js/blockexplorer.js
+++ b/js/blockexplorer.js
@@ -120,21 +120,25 @@ blockchainExplorer = function(){
 
   function _addDivForBlock(block_height, onTop = false)
   {
-    var tmp;
-    var contenu = _addDiv(block_height);
-    var block_desc = '';
+    var lediv = document.getElementById('info_'+block_height);
+    if (lediv === null)
+    {
+      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>';
+      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)
+      tmp = contenu.replace('###BLOCK_DESC###',block_desc)
 
-    if (onTop) {
-      tmp += $('#blockchain').html();
-      $('#blockchain').html(tmp);
-    } else {
-      $('#blockchain').append(tmp);
+      if (onTop) {
+        tmp += $('#blockchain').html();
+        $('#blockchain').html(tmp);
+      } else {
+        $('#blockchain').append(tmp);
+      }
     }
     return true;
   }
@@ -296,6 +300,9 @@ blockchainExplorer = function(){
 
         return true;
       });
+    } else {
+      _initBlockchain('LAST');
+      return true;
     }
   }