diff --git a/backtrace.php b/backtrace.php
new file mode 100644
index 0000000..49addbd
--- /dev/null
+++ b/backtrace.php
@@ -0,0 +1,51 @@
+<?php
+
+/** Display the backtrace in HTML with clicks to display the content
+  */
+class backtrace
+{
+  /** Display the backtrace in the browser
+    * use: \backtrace::show (debug_backtrace ());
+    */
+  public static function show ($backtrace)
+  {
+    echo "<pre>Debug BackTrace:\n";
+    foreach ($backtrace as $key=>$back)
+    {
+      echo "<span onclick=\"document.getElementById('backtrace_$key').".
+           "classList.toggle('hidden');\" style='cursor: pointer;'>";
+      echo "$key => ";
+      if (array_key_exists ("file", $back))
+        echo $back["file"]."[".$back["line"]."] : ";
+      if (array_key_exists ("class", $back))
+        echo $back["class"];
+      echo "::".$back["function"]. "(";
+      if (array_key_exists ("args", $back))
+      {
+        foreach ($back["args"] as $k=>$arg)
+        {
+          if ($k > 0)
+            echo ", ";
+          if (is_array ($arg))
+            echo "ARRAY";
+          elseif (is_object ($arg))
+            echo "OBJECT ".get_class ($arg);
+          elseif (is_bool ($arg))
+            echo ($arg === true) ? "true" : "false";
+          elseif (is_string ($arg))
+            echo "\"$arg\"";
+          elseif (is_int ($arg) || is_float ($arg))
+            echo $arg;
+          else
+            var_dump ($arg);
+        }
+      }
+      echo ")";
+      echo "</span>";
+      echo "<div id='backtrace_$key' class='hidden'>";
+      print_r ($back);
+      echo "</div>\n";
+    }
+    echo "</pre>\n";
+  }
+}