diff --git a/htdocs/index.html b/htdocs/index.html
index 23d97e5..f5fec45 100644
--- a/htdocs/index.html
+++ b/htdocs/index.html
@@ -11,34 +11,34 @@
           <div class="row">
             <div class="col-md-4">
               <h3>Line Chart</h3>
-              <a href="./samples/simple.html" target="_blank">
+              <a href="./samples/simple.html">
                 Line chart with ordinary data
               </a>
-              <a href="./samples/chart_spline.html" target="_blank">
+              <a href="./samples/chart_spline.html">
                 Spline chart with ordinary data
               </a>
-              <a href="./samples/chart_step.html" target="_blank">
+              <a href="./samples/chart_step.html">
                 Step chart with ordinary data
               </a>
             </div>
             <div class="col-md-4">
               <h3>Area Chart</h3>
-              <a href="./samples/chart_area.html" target="_blank">
+              <a href="./samples/chart_area.html">
                 Area chart with ordinary data
               </a>
-              <a class="btn btn-danger" href="./samples/chart_area_spline.html" target="_blank">
+              <a class="btn btn-danger" href="./samples/chart_area_spline.html">
                 Area-spline chart with ordinary data
               </a>
-              <a class="btn btn-danger" href="./samples/chart_area_step.html" target="_blank">
+              <a class="btn btn-danger" href="./samples/chart_area_step.html">
                 Area-step chart with ordinary data
               </a>
             </div>
             <div class="col-md-4">
               <h3>Bar Chart</h3>
-              <a href="./samples/chart_bar.html" target="_blank">
+              <a href="./samples/chart_bar.html">
                 Bar chart with ordinary data
               </a>
-              <a href="./samples/chart_bar_stacked.html" target="_blank">
+              <a href="./samples/chart_bar_stacked.html">
                 Stacked Bar chart with ordinary data
               </a>
             </div>
@@ -46,19 +46,19 @@
           <div class="row">
             <div class="col-md-4">
               <h3>Pie Chart</h3>
-              <a href="./samples/chart_pie.html" target="_blank">
+              <a href="./samples/chart_pie.html">
                 Pie chart with ordinary data
               </a>
             </div>
             <div class="col-md-4">
               <h3>Donut Chart</h3>
-              <a href="./samples/chart_donut.html" target="_blank">
+              <a href="./samples/chart_donut.html">
                 Donut chart with ordinary data
               </a>
             </div>
             <div class="col-md-4">
               <h3>Gauge Chart</h3>
-              <a href="./samples/chart_gauge.html" target="_blank">
+              <a href="./samples/chart_gauge.html">
                 Gauge chart with ordinary data
               </a>
             </div>
@@ -66,13 +66,13 @@
           <div class="row">
             <div class="col-md-4">
               <h3>Scatter Chart</h3>
-              <a href="./samples/chart_scatter.html" target="_blank">
+              <a href="./samples/chart_scatter.html">
                 Pie chart with ordinary data
               </a>
             </div>
             <div class="col-md-4">
               <h3>Combination Chart</h3>
-              <a href="./samples/chart_combination.html" target="_blank">
+              <a href="./samples/chart_combination.html">
                 Combination chart with ordinary data
               </a>
             </div>
@@ -86,31 +86,31 @@
           <div class="row">
             <div class="col-md-4">
               <h3>Timeseries Axis</h3>
-              <a href="./samples/timeseries.html" target="_blank">
+              <a href="./samples/timeseries.html">
                 Line chart with timeseries data
               </a>
-              <a href="./samples/timeseries_descendent.html" target="_blank">
+              <a href="./samples/timeseries_descendent.html">
                 Line chart with descendent timeseries data
               </a>
-              <a href="./samples/timeseries_raw.html" target="_blank">
+              <a href="./samples/timeseries_raw.html">
                 Line chart with timeseries data as Number
               </a>
-              <a href="./samples/timeseries_date.html" target="_blank">
+              <a href="./samples/timeseries_date.html">
                 Line chart with timeseries data as Date object
               </a>
             </div>
             <div class="col-md-4">
               <h3>Category Axis</h3>
-              <a href="./samples/categorized.html" target="_blank">
+              <a href="./samples/categorized.html">
                 Chart with category axis
               </a>
-              <a href="./samples/custom_x_categorized.html" target="_blank">
+              <a href="./samples/custom_x_categorized.html">
                 Chart with category data on category axis
               </a>
             </div>
             <div class="col-md-4">
               <h3>Additional Axis</h3>
-              <a href="./samples/axes_y2.html" target="_blank">
+              <a href="./samples/axes_y2.html">
                 Add y2 axis
               </a>
             </div>
@@ -118,28 +118,28 @@
           <div class="row">
             <div class="col-md-4">
               <h3>Axis Range</h3>
-              <a href="./samples/axes_range.html" target="_blank">
+              <a href="./samples/axes_range.html">
                 Set range of axis
               </a>
             </div>
             <div class="col-md-4">
               <h3>Axis Padding</h3>
-              <a href="./samples/axes_padding.html" target="_blank">
+              <a href="./samples/axes_padding.html">
                 Set padding of axis
               </a>
             </div>
             <div class="col-md-4">
               <h3>X Axis Tick</h3>
-              <a href="./samples/axes_x_tick_culling.html" target="_blank">
+              <a href="./samples/axes_x_tick_culling.html">
                 Set culling for x axis
               </a>
-              <a href="./samples/axes_x_tick_fit.html" target="_blank">
+              <a href="./samples/axes_x_tick_fit.html">
                 Set fitting for x axis
               </a>
-              <a href="./samples/axes_x_tick_rotate.html" target="_blank">
+              <a href="./samples/axes_x_tick_rotate.html">
                 Set rotation for x axis
               </a>
-              <a href="./samples/axes_x_range_timeseries.html" target="_blank">
+              <a href="./samples/axes_x_range_timeseries.html">
                 Set range in timeseries for x axis
               </a>
             </div>
@@ -147,7 +147,7 @@
           <div class="row">
             <div class="col-md-4">
               <h3>Y Domain</h3>
-              <a href="./samples/domain_y.html" target="_blank">
+              <a href="./samples/domain_y.html">
                 Update y domain automatically
               </a>
             </div>
@@ -161,37 +161,37 @@
           <div class="row">
             <div class="col-md-4">
               <h3>Input Data</h3>
-              <a href="./samples/data_columned.html" target="_blank">
+              <a href="./samples/data_columned.html">
                 Columned data
               </a>
-              <a href="./samples/data_rowed.html" target="_blank">
+              <a href="./samples/data_rowed.html">
                 Rowed data
               </a>
-              <a href="./samples/data_json.html" target="_blank">
+              <a href="./samples/data_json.html">
                 JSON data
               </a>
-              <a href="./samples/data_url.html" target="_blank">
+              <a href="./samples/data_url.html">
                 Data from URL
               </a>
-              <a href="./samples/data_hide.html" target="_blank">
+              <a href="./samples/data_hide.html">
                 Hide data when init
               </a>
             </div>
             <div class="col-md-4">
               <h3>Load Data</h3>
-              <a href="./samples/data_load.html" target="_blank">
+              <a href="./samples/data_load.html">
                 Load ordinary data
               </a>
-              <a href="./samples/data_load_timeseries.html" target="_blank">
+              <a href="./samples/data_load_timeseries.html">
                 Load timeseries data
               </a>
             </div>
             <div class="col-md-4">
               <h3>Custom X</h3>
-              <a href="./samples/custom_x_scale.html" target="_blank">
+              <a href="./samples/custom_x_scale.html">
                 Custom x for all data
               </a>
-              <a href="./samples/custom_xs_scale.html" target="_blank">
+              <a href="./samples/custom_xs_scale.html">
                 Custom x for each data
               </a>
             </div>
@@ -199,19 +199,19 @@
           <div class="row">
             <div class="col-md-4">
               <h3>Data Label</h3>
-              <a href="./samples/data_label.html" target="_blank">
+              <a href="./samples/data_label.html">
                 Show label on data
               </a>
-              <a href="./samples/data_label_format.html" target="_blank">
+              <a href="./samples/data_label_format.html">
                 Show label on data with format
               </a>
             </div>
             <div class="col-md-4">
               <h3>Data Region</h3>
-              <a href="./samples/data_region.html" target="_blank">
+              <a href="./samples/data_region.html">
                 Set region of data
               </a>
-              <a href="./samples/data_region_timeseries.html" target="_blank">
+              <a href="./samples/data_region_timeseries.html">
                 Set region of timeseries data
               </a>
             </div>
@@ -225,28 +225,28 @@
           <div class="row">
             <div class="col-md-4">
               <h3>Grid</h3>
-              <a href="./samples/grids.html" target="_blank">
+              <a href="./samples/grids.html">
                  Show x/y grids
               </a>
-              <a href="./samples/grids_timeseries.html" target="_blank">
+              <a href="./samples/grids_timeseries.html">
                  Show x/y grids with timeseries
               </a>
-              <a href="./samples/grid_x_lines.html" target="_blank">
+              <a href="./samples/grid_x_lines.html">
                  Show optional x grids
               </a>
-              <a href="./samples/grid_x_lines_timeseries.html" target="_blank">
+              <a href="./samples/grid_x_lines_timeseries.html">
                  Show optional x grids with timeseries
               </a>
             </div>
             <div class="col-md-4">
               <h3>Region</h3>
-              <a href="./samples/region.html" target="_blank">
+              <a href="./samples/region.html">
                  Show regions
               </a>
             </div>
             <div class="col-md-4">
               <h3>Legend</h3>
-              <a href="./samples/legend.html" target="_blank">
+              <a href="./samples/legend.html">
                  Show legend
               </a>
             </div>
@@ -254,10 +254,10 @@
           <div class="row">
             <div class="col-md-4">
               <h3>Tooltip</h3>
-              <a href="./samples/tooltip_show.html" target="_blank">
+              <a href="./samples/tooltip_show.html">
                 Show tooltip
               </a>
-              <a href="./samples/tooltip_grouped.html" target="_blank">
+              <a href="./samples/tooltip_grouped.html">
                 Show tooltip as each data
               </a>
             </div>
@@ -271,22 +271,22 @@
           <div class="row">
             <div class="col-md-4">
               <h3>Bind</h3>
-              <a href="./samples/bindto.html" target="_blank">
+              <a href="./samples/bindto.html">
                 Specify the element binded
               </a>
             </div>
             <div class="col-md-4">
               <h3>Padding</h3>
-              <a href="./samples/padding.html" target="_blank">
+              <a href="./samples/padding.html">
                 Change padding of chart
               </a>
-              <a href="./samples/padding_update.html" target="_blank">
+              <a href="./samples/padding_update.html">
                 Auto padding when chart updated
               </a>
             </div>
             <div class="col-md-4">
               <h3>Empty Data</h3>
-              <a href="./samples/emptydata.html" target="_blank">
+              <a href="./samples/emptydata.html">
                 Show text when empty data
               </a>
             </div>
@@ -294,7 +294,7 @@
           <div class="row">
             <div class="col-md-4">
               <h3>Point</h3>
-              <a href="./samples/point_r.html" target="_blank">
+              <a href="./samples/point_r.html">
                 Change radius of data point
               </a>
             </div>
@@ -308,16 +308,16 @@
           <div class="row">
             <div class="col-md-4">
               <h3>Zoom</h3>
-              <a href="./samples/zoom.html" target="_blank">
+              <a href="./samples/zoom.html">
                 Enable zoom
               </a>
-              <a href="./samples/zoom_reduction.html" target="_blank">
+              <a href="./samples/zoom_reduction.html">
                 Zoom with reduction
               </a>
             </div>
             <div class="col-md-4">
               <h3>Selection</h3>
-              <a href="./samples/selection.html" target="_blank">
+              <a href="./samples/selection.html">
                 Select data
               </a>
             </div>
@@ -331,28 +331,28 @@
           <div class="row">
             <div class="col-md-4">
               <h3>Flow</h3>
-              <a href="./samples/api_flow.html" target="_blank">
+              <a href="./samples/api_flow.html">
                 Flow ordinary data
               </a>
-              <a href="./samples/api_flow_timeseries.html" target="_blank">
+              <a href="./samples/api_flow_timeseries.html">
                 Flow timeseries data
               </a>
             </div>
             <div class="col-md-4">
               <h3>Axis</h3>
-              <a href="./samples/api_axis_range.html" target="_blank">
+              <a href="./samples/api_axis_range.html">
                 Update axis range
               </a>
-              <a href="./samples/api_axis_label.html" target="_blank">
+              <a href="./samples/api_axis_label.html">
                 Update axis label
               </a>
             </div>
             <div class="col-md-4">
               <h3>grid</h3>
-              <a href="./samples/api_xgrid_lines.html" target="_blank">
+              <a href="./samples/api_xgrid_lines.html">
                 Update x grid lines
               </a>
-              <a href="./samples/api_ygrid_lines.html" target="_blank">
+              <a href="./samples/api_ygrid_lines.html">
                 Update y grid lines
               </a>
             </div>
@@ -360,19 +360,19 @@
           <div class="row">
             <div class="col-md-4">
               <h3>Legend</h3>
-              <a href="./samples/api_legend.html" target="_blank">
+              <a href="./samples/api_legend.html">
                 Update legend
               </a>
             </div>
             <div class="col-md-4">
               <h3>Transform</h3>
-              <a href="./samples/api_transform.html" target="_blank">
+              <a href="./samples/api_transform.html">
                 Transform chart
               </a>
             </div>
             <div class="col-md-4">
               <h3>Element</h3>
-              <a href="./samples/element.html" target="_blank">
+              <a href="./samples/element.html">
                 Access svg element of chart
               </a>
             </div>
@@ -386,7 +386,7 @@
           <div class="row">
             <div class="col-md-4">
               <h3>RequireJS</h3>
-              <a href="./samples/requirejs.html" target="_blank">
+              <a href="./samples/requirejs.html">
                 Load by RequireJS
               </a>
             </div>