diff --git a/src/HTMLRenderer/HTMLRenderer.h b/src/HTMLRenderer/HTMLRenderer.h
index b916155..04b190a 100644
--- a/src/HTMLRenderer/HTMLRenderer.h
+++ b/src/HTMLRenderer/HTMLRenderer.h
@@ -45,7 +45,8 @@
  *
  * Cd - CSS Draw
  *
- * Reusable CSS classes
+ * Numbered CSS classes
+ * See also: HTMLRenderer::TextLineBuffer::format_str
  *
  * t<hex> - Transform matrix
  * f<hex> - Font (also for font names)
@@ -56,6 +57,7 @@
  * _<hex> - white space
  * r<hex> - Rise
  * h<hex> - Height
+ * L<hex> - Left
  *
  */
 
@@ -230,6 +232,7 @@ class HTMLRenderer : public OutputDev
         long long install_whitespace(double ws_width, double & actual_width);
         long long install_rise(double rise);
         long long install_height(double height);
+        long long install_left(double left);
 
         ////////////////////////////////////////////////////
         // export css styles
@@ -250,6 +253,7 @@ class HTMLRenderer : public OutputDev
         void export_whitespace(long long ws_id, double ws_width);
         void export_rise(long long rise_id, double rise);
         void export_height(long long height_id, double height);
+        void export_left(long long left_id, double left);
 
         // depending on single-html, to embed the content or add a link to it
         // "type": specify the file type, usually it's the suffix, in which case this parameter could be ""
@@ -417,6 +421,7 @@ class HTMLRenderer : public OutputDev
         std::map<double, long long> whitespace_map;
         std::map<double, long long> rise_map;
         std::map<double, long long> height_map;
+        std::map<double, long long> left_map;
 
         const Param * param;
         std::ofstream html_fout, css_fout;
diff --git a/src/HTMLRenderer/TextLineBuffer.cc b/src/HTMLRenderer/TextLineBuffer.cc
index a3ecc52..4c17afe 100644
--- a/src/HTMLRenderer/TextLineBuffer.cc
+++ b/src/HTMLRenderer/TextLineBuffer.cc
@@ -84,11 +84,12 @@ void HTMLRenderer::TextLineBuffer::flush(void)
     }
 
     ostream & out = renderer->html_fout;
-    out << "<div style=\"left:" 
-        << round(x) << "px;bottom:" 
-        << round(y) << "px;"
+    out << "<div style=\""
+        << "bottom:" << round(y) << "px;"
         << "\""
-        << " class=\"l t" << tm_id 
+        << " class=\"l"
+        << " t" << tm_id 
+        << " L" << renderer->install_left(x)
         << " h" << renderer->install_height(max_ascent)
         << "\">";
 
diff --git a/src/HTMLRenderer/export.cc b/src/HTMLRenderer/export.cc
index da6e40c..ef69417 100644
--- a/src/HTMLRenderer/export.cc
+++ b/src/HTMLRenderer/export.cc
@@ -166,5 +166,9 @@ void HTMLRenderer::export_height (long long height_id, double height)
 {
     css_fout << ".h" << height_id << "{height:" << round(height) << "px;}" << endl;
 }
+void HTMLRenderer::export_left (long long left_id, double left) 
+{
+    css_fout << ".L" << left_id << "{left:" << round(left) << "px;}" << endl;
+}
 
 }
diff --git a/src/HTMLRenderer/install.cc b/src/HTMLRenderer/install.cc
index b540434..4dac8d2 100644
--- a/src/HTMLRenderer/install.cc
+++ b/src/HTMLRenderer/install.cc
@@ -321,5 +321,18 @@ long long HTMLRenderer::install_height(double height)
     export_height(new_height_id, height);
     return new_height_id;
 }
+long long HTMLRenderer::install_left(double left)
+{
+    auto iter = left_map.lower_bound(left - param->h_eps);
+    if((iter != left_map.end()) && (abs(iter->first - left) < param->h_eps))
+    {
+        return iter->second;
+    }
+
+    long long new_left_id = left_map.size();
+    left_map.insert(make_pair(left, new_left_id));
+    export_left(new_left_id, left);
+    return new_left_id;
+}
 
 } // namespace pdf2htmlEX