diff --git a/index.html b/index.html
index 6673dbd..2a1d66a 100755
--- a/index.html
+++ b/index.html
@@ -130,7 +130,6 @@
     <li><a href="get-hierarchy.html" target="_blank">getHierarchy() method</a></li>
     <li><a href="integrate-map.html" target="_blank">itegrate orgchart with map info</a></li>
     <li><a href="local-datasource.html" target="_blank">local datasource</a></li>
-    <li><a href="multiple-layers.html" target="_blank">multiple-layers chart</a></li>
     <li><a href="ondemand-loading-data.html" target="_blank">load data on-demand</a></li>
     <li><a href="option-createNode.html" target="_blank">createNode callback</a></li>
     <li><a href="pan-zoom.html" target="_blank">pan and zoom the chart</a></li>
diff --git a/multiple-layers.html b/multiple-layers.html
deleted file mode 100755
index 1902212..0000000
--- a/multiple-layers.html
+++ /dev/null
@@ -1,128 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-  <meta charset="utf-8">
-  <title>Organization Chart Plugin</title>
-  <link rel="icon" href="img/logo.png">
-  <link rel="stylesheet" href="css/jquery.orgchart.css">
-  <link rel="stylesheet" href="css/style.css">
-  <style type="text/css">
-    .hidden { display: none; }
-    .orgchart .drill-icon {
-      transition: opacity .5s;
-      opacity: 0;
-      right: -10px;
-      top: -10px;
-      z-index: 2;
-      position: absolute;
-    }
-    .orgchart .drill-icon::before {
-      background-color: rgba(68, 157, 68, 0.5);
-    }
-    .orgchart .drill-icon:hover::before { background-color: #449d44; }
-    .orgchart .node:hover .drill-icon { opacity: 1; }
-  </style>
-</head>
-<body>
-  <div id="chart-container"></div>
-
-  <script type="text/javascript" src="js/jquery.min.js"></script>
-  <script type="text/javascript" src="js/jquery.orgchart.js"></script>
-  <script type="text/javascript" src="js/jquery.mockjax.min.js"></script>
-  <script type="text/javascript">
-    $.mockjax({
-    url: '/orgchart/root-node',
-    responseTime: 1000,
-    contentType: 'application/json',
-    responseText: {
-      'className': 'root-node',
-      'name': 'Lao Lao',
-      'dept': 'president office',
-      'children': [
-        { 'name': 'Bo Miao', 'dept': 'product dept' },
-        { 'className': 'drill-down asso-rd', 'name': 'Su Miao', 'dept': 'R&D dept' },
-        { 'name': 'Hong Miao', 'dept': 'finance dept' },
-        { 'name': 'Chun Miao', 'dept': 'HR dept' }
-      ]
-    }
-  });
-
-  $.mockjax({
-    url: '/orgchart/asso-rd',
-    responseTime: 1000,
-    contentType: 'application/json',
-    responseText: {
-      'className': 'asso-rd drill-up',
-      'name': 'Su Miao',
-      'dept': 'R&D dept',
-      'children': [
-        { 'name': 'Tie Hua', 'dept': 'backend group' },
-        { 'className': 'drill-down asso-frontend', 'name': 'Hei Hei', 'dept': 'frontend group' }
-      ]
-    }
-  });
-
-  $.mockjax({
-    url: '/orgchart/asso-frontend',
-    responseTime: 1000,
-    contentType: 'application/json',
-    responseText:  {
-      'className': 'asso-frontend drill-up',
-      'name': 'Hei Hei',
-      'dept': 'frontend group',
-      'children': [
-        { 'name': 'Pang Pang', 'dept': 'frontend group' },
-        { 'name': 'Xiang Xiang', 'dept': 'frontend group',
-          'children': [
-            { 'name': 'Xiao Xiao', 'dept': 'frontend group' },
-            { 'name': 'Dan Dan', 'dept': 'frontend group' },
-            { 'name': 'Zai Zai', 'dept': 'frontend group' }
-          ]
-        }
-      ]
-    }
-  });
-
-  function initOrgchart(rootClass) {
-    $('#chart-container').orgchart({
-      'chartClass': rootClass,
-      'data' : '/orgchart/' + rootClass,
-      'nodeContent': 'dept',
-      'createNode': function($node, data) {
-        if ($node.is('.drill-down')) {
-          var assoClass = data.className.match(/asso-\w+/)[0];
-          var drillDownIcon = $('<i>', {
-            'class': 'oci oci-arrow-circle-down drill-icon',
-            'click': function() {
-              $('#chart-container').find('.orgchart:visible').addClass('hidden');
-              if (!$('#chart-container').find('.orgchart.' + assoClass).length) {
-                initOrgchart(assoClass);
-              } else {
-                $('#chart-container').find('.orgchart.' + assoClass).removeClass('hidden');
-              }
-            }
-          });
-          $node.append(drillDownIcon);
-        } else if ($node.is('.drill-up')) {
-          var assoClass = data.className.match(/asso-\w+/)[0];
-          var drillUpIcon = $('<i>', {
-            'class': 'oci oci-arrow-circle-up drill-icon',
-            'click': function() {
-              $('#chart-container').find('.orgchart:visible').addClass('hidden').end()
-                .find('.drill-down.' + assoClass).closest('.orgchart').removeClass('hidden');
-            }
-          });
-          $node.append(drillUpIcon);
-        }
-      }
-    });
-  }
-
-  $(function() {
-
-    initOrgchart('root-node');
-
-  });
-  </script>
-  </body>
-</html>
\ No newline at end of file
