diff --git a/accessible/tests/mochitest/Makefile.in b/accessible/tests/mochitest/Makefile.in
index 018dd9a59ef0..77a6da177916 100644
--- a/accessible/tests/mochitest/Makefile.in
+++ b/accessible/tests/mochitest/Makefile.in
@@ -48,6 +48,9 @@ include $(topsrcdir)/config/rules.mk
 _TEST_FILES =\
 		test_bug368835.xul \
 		test_groupattrs.xul \
+		test_nsIAccessibleTable_1.html \
+		test_nsIAccessibleTable_2.html \
+		test_nsIAccessibleTable_3.html \
 		$(NULL)
 
 libs:: $(_TEST_FILES)
diff --git a/accessible/tests/mochitest/test_nsIAccessibleTable_1.html b/accessible/tests/mochitest/test_nsIAccessibleTable_1.html
new file mode 100644
index 000000000000..d176e9c110d8
--- /dev/null
+++ b/accessible/tests/mochitest/test_nsIAccessibleTable_1.html
@@ -0,0 +1,144 @@
+<!DOCTYPE HTML PUBLIC "-//w3c//dtd html 4.0 transitional//en">
+<html>
+ <head>
+  <meta http-equiv="content-type" content="text/html; charset=UTF-8">
+  <link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css" />
+  <script type="application/javascript" src="chrome://mochikit/content/MochiKit/packed.js"></script>
+  <script type="application/javascript" src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+  <script type="application/javascript">
+
+function doTest()
+{
+  netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");
+  var table = document.getElementById("table");
+  var accService = Components.classes["@mozilla.org/accessibleRetrieval;1"].
+                   getService(Components.interfaces.nsIAccessibleRetrieval);
+  var accTable   = accService.getAccessibleFor(table).
+                   QueryInterface(Components.interfaces.nsIAccessibleTable);
+  var caption = accTable.caption;
+  is(caption.firstChild.name, "Test Table", "wrong text inside caption");
+  const nsIAccessNode = Components.interfaces.nsIAccessible;
+
+  is(caption.children.queryElementAt(0, nsIAccessNode).name, "Test Table",
+     "wrong text inside caption");
+
+  is(accTable.summary, "this is a test table for nsIAccessibleTable",
+     "wrong summary on table");
+  is(accTable.columns, 4,"wrong number of columns");
+  is(accTable.rows, 3, "wrong number of rows");
+
+  var s = window.getSelection();
+  if (s.rangeCount > 0)
+    s.removeAllRanges();
+
+  var cell = document.getElementById("col2b");
+  var range = document.createRange();
+  range.selectNode(cell);
+  s.addRange(range);
+
+  is(accTable.selectedCellsCount, 1,"only one cell selected");
+  cell = document.getElementById("col2a");
+  range.selectNode(cell);
+  s.addRange(range);
+  cell = document.getElementById("col2c");
+  range.selectNode(cell);
+  s.addRange(range);
+  is(accTable.selectedColumnsCount, 1, "only one column selected");
+  cell = document.getElementById("row2a");
+  range.selectNode(cell);
+  s.addRange(range);
+  cell = document.getElementById("row2b");
+  range.selectNode(cell);
+  s.addRange(range);
+  cell = document.getElementById("row2c");
+  range.selectNode(cell);
+  s.addRange(range);
+
+  is(accTable.selectedRowsCount, 1, "no cells selected");
+
+  var rowheader;
+  var works;
+  works = true;
+  try {
+    rowheader  = accTable.rowHeader;
+  }
+  catch (e) {
+    works = false;
+  }
+  todo(works, "rowHeader should not throw");
+
+  var columnHeader;
+  works = true;
+  try {
+    columnHeader = accTable.columnHeader;
+    columnHeaderIndex =columnHeader.getIndexAt(0,2);
+    is(columnHeaderIndex, 2, "columnheaderindex is wrong");
+  }
+  catch (e) {
+    works = false;
+  }
+  todo(works, "columnHeader should not throw");
+
+  var columnDescription;
+  works = true;
+  try{
+    columnDescription = accTable.getColumnDescription(1);
+  }
+  catch (e) {
+    works = false;
+  }
+  todo(works, "columnDescription should not throw");
+
+  var rowDescription;
+  works = true;
+  try {
+    rowDescription = accTable.getRowDescription(1);
+  }
+  catch (e) {
+    works = false;
+  }
+  todo(works, "rowDescription should not throw");
+  SimpleTest.finish();
+}
+SimpleTest.waitForExplicitFinish();
+addLoadEvent(doTest);
+  </script>
+ </head>
+ <body >
+
+  <a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=410052">Mozilla Bug 410052</a>
+  <p id="display"></p>
+  <div id="content" style="display: none"></div>
+  <pre id="test">
+  </pre>
+
+  <!-- Test Table -->
+  <br><br><b> Testing Table:</b><br><br>
+  <center>
+   <table id="table" border="1"
+          summary="this is a test table for nsIAccessibleTable" >
+    <caption>Test Table</caption>
+    <thead>
+     <tr>
+      <th></th>
+      <th>columnHeader_1</th>
+      <th id ="col2a">columnHeader_2</th>
+      <th>columnHeader_3</th>
+     </tr>
+    </thead>
+    <tr>
+     <th id="row2a">rowHeader_1</th>
+     <td id="row2b">row1_column1</td>
+     <td id ="col2b">row1_column2</td>
+     <td id="row2c">row1_column3</td>
+    </tr>
+    <tr>
+     <th>rowHeader_2</th>
+     <td>row2_column1</td>
+     <td id ="col2c">row2_column2</td>
+     <td>row2_column3</td>
+    </tr>
+   </table>
+  </center>
+ </body>
+</html>
diff --git a/accessible/tests/mochitest/test_nsIAccessibleTable_2.html b/accessible/tests/mochitest/test_nsIAccessibleTable_2.html
new file mode 100644
index 000000000000..f7b3b1956344
--- /dev/null
+++ b/accessible/tests/mochitest/test_nsIAccessibleTable_2.html
@@ -0,0 +1,87 @@
+<!DOCTYPE HTML PUBLIC "-//w3c//dtd html 4.0 transitional//en">
+<html>
+ <head>
+  <meta http-equiv="content-type" content="text/html; charset=UTF-8">
+  <title> nsIAccessibleTable Interface Test Case </title>
+  <link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css" />
+  <script type="application/javascript" src="chrome://mochikit/content/MochiKit/packed.js"></script>
+  <script type="application/javascript" src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+  <script type="text/javascript">
+
+function doTest()
+{
+  netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");
+
+  var table = document.getElementById("table");
+  var accService = Components.classes["@mozilla.org/accessibleRetrieval;1"].
+                   getService(Components.interfaces.nsIAccessibleRetrieval);
+
+  var accTable = accService.getAccessibleFor(table).
+                 QueryInterface(Components.interfaces.nsIAccessibleTable);
+
+  is(accTable.getIndexAt(2,4), 17, "wrong index returned");
+  is(accTable.getColumnAtIndex(18), 5,"got wrong column");
+  is(accTable.getRowAtIndex(10), 1, "wrong row");
+  is(accTable.getColumnExtentAt(2,2), 2, "colspan wrong");
+  is(accTable.getColumnExtentAt(0,3), 2, "colspan wrong");
+  is(accTable.getColumnExtentAt(3,5), 1, "colspan");
+  is(accTable.getRowExtentAt(0,7), 4, "rowspan wrong");
+  is(accTable.getRowExtentAt(2,7), 4,"rowspan wrong");
+  is(accTable.getColumnExtentAt(2,3), 1, "colspan wrong");
+  is(accTable.cellRefAt(2,1).firstChild.name, "c1", "wrong cell");
+  SimpleTest.finish();
+}
+
+SimpleTest.waitForExplicitFinish();
+addLoadEvent(doTest);
+  </script>
+ </head>
+ <body>
+  <a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=410052">Mozilla Bug 410052</a>
+  <p id="display"></p>
+  <div id="content" style="display: none"></div>
+  <pre id="test">
+  </pre>
+
+  <!-- Test Table -->
+  <br><br><b> Testing Table:</b><br><br>
+  <center>
+   <table cellpadding="2" cellspacing="2" border="1" width="50%" id="table">
+    <tbody>
+     <tr>
+      <td><br></td>
+      <td><br></td>
+      <td rowspan="1" colspan="2"><br></td>
+      <td><br></td>
+      <td><br></td>
+      <td><br></td>
+      <td rowspan="4" colspan="1"><br></td>
+     </tr>
+     <tr>
+      <td><br></td>
+      <td><br></td>
+      <td><br></td>
+      <td><br></td>
+      <td><br></td>
+      <td><br></td>
+      <td><br></td>
+     </tr>
+     <tr>
+      <td><br></td>
+      <td rowspan="2" colspan="2">c1</td>
+      <td><br></td>
+      <td><br></td>
+      <td rowspan="2" colspan="1"><br></td>
+      <td><br></td>
+     </tr>
+     <tr>
+      <td><br></td>
+      <td><br></td>
+      <td><br></td>
+      <td><br></td>
+     </tr>
+    </tbody>
+   </table>
+  </center>
+ </body>
+</html>
diff --git a/accessible/tests/mochitest/test_nsIAccessibleTable_3.html b/accessible/tests/mochitest/test_nsIAccessibleTable_3.html
new file mode 100644
index 000000000000..06adab33a200
--- /dev/null
+++ b/accessible/tests/mochitest/test_nsIAccessibleTable_3.html
@@ -0,0 +1,127 @@
+<!DOCTYPE HTML PUBLIC "-//w3c//dtd html 4.0 transitional//en">
+<html>
+ <head>
+  <meta http-equiv="content-type" content="text/html; charset=UTF-8">
+  <title> nsIAccessibleTable Interface Test Case </title>
+  <link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css" />
+  <script type="application/javascript" src="chrome://mochikit/content/MochiKit/packed.js"></script>
+  <script type="application/javascript" src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+  <script type="text/javascript">
+
+function doTest()
+{
+  netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");
+  var table = document.getElementById("table");
+  var accService = Components.classes["@mozilla.org/accessibleRetrieval;1"].
+                   getService(Components.interfaces.nsIAccessibleRetrieval);
+
+  var accTable = accService.getAccessibleFor(table).
+                 QueryInterface(Components.interfaces.nsIAccessibleTable);
+    
+  is(accTable.getSelectedCells({}).length, 0, "no cell selected");
+  for (var i = 0; i < 4; i++) {
+    accTable.selectRow(i);
+    for (var j = 0; j < 4; j++) {
+      if (i == j) {
+        ok(accTable.isRowSelected(i),"row not selected");
+      }
+      else {
+        todo(!accTable.isRowSelected(i),"row selected");
+      }
+    }
+  }
+  todo_is(accTable.selectedRowsCount, 1, "only one row should be selected");
+  todo_is(accTable.getSelectedRows({}).length, 1,
+         "only one row should be selected");
+
+  for (var i = 0; i < 4; i++) {
+    accTable.unselectRow(i);
+    ok(!accTable.isRowSelected(i), "row still selected");
+  }
+  todo_is(accTable.getSelectedCells({}).length, 0, "no cell selected");
+  todo_is(accTable.selectedCellsCount, 0, "no cell selected");
+  var s = window.getSelection();
+  if (s.rangeCount > 0)
+    s.removeAllRanges();
+
+  is(accTable.getSelectedCells({}).length, 0, "no cell selected");
+  is(accTable.selectedCellsCount, 0, "no cell selected");
+  for (var i = 0; i < 8; i++) {
+    accTable.selectColumn(i);
+    for (var j = 0; j < 8; j++) {
+      if (i ==j) {
+        ok(accTable.isColumnSelected(i),"column not selected");
+      }
+      else {
+        todo(!accTable.isColumnSelected(i),"column is selected");
+      }
+    }
+  }
+  todo_is(accTable.selectedColumnsCount, 1,
+          "only one column should be selected");
+  todo_is(accTable.getSelectedColumns({}).length, 1,
+          "only one column should be selected");
+  for (var i = 0; i < 8; i++) {
+    accTable.unselectColumn(i);
+    ok(!accTable.isColumnSelected(i),"column still selected");
+  }
+  is(accTable.selectedColumnsCount, 0, "no column should be selected");
+  ok(!accTable.isProbablyForLayout(), "table is not for layout");
+  SimpleTest.finish();
+}
+
+SimpleTest.waitForExplicitFinish();
+addLoadEvent(doTest);
+  </script>
+ </head>
+ <body>
+
+  <a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=410052">Mozilla Bug 410052</a>
+  <p id="display"></p>
+  <div id="content" style="display: none"></div>
+  <pre id="test">
+  </pre>
+
+
+  <!-- Test Table -->
+  <br><br><b> Testing Table:</b><br><br>
+  <center>
+   <table cellpadding="2" cellspacing="2" border="1" width="50%" id="table">
+    <tbody>
+     <tr>
+      <td><br></td>
+      <td><br></td>
+      <td rowspan="1" colspan="2"><br></td>
+      <td><br></td>
+      <td><br></td>
+      <td><br></td>
+      <td rowspan="4" colspan="1"><br></td>
+     </tr>
+     <tr>
+      <td><br></td>
+      <td><br></td>
+      <td><br></td>
+      <td><br></td>
+      <td><br></td>
+      <td><br></td>
+      <td><br></td>
+     </tr>
+     <tr>
+      <td><br></td>
+      <td rowspan="2" colspan="2">c1</td>
+      <td><br></td>
+      <td><br></td>
+      <td rowspan="2" colspan="1"><br></td>
+      <td><br></td>
+     </tr>
+     <tr>
+      <td><br></td>
+      <td><br></td>
+      <td><br></td>
+      <td><br></td>
+     </tr>
+    </tbody>
+   </table>
+  </center>
+ </body>
+</html>

	columnHeader_1	columnHeader_2	columnHeader_3
rowHeader_1	row1_column1	row1_column2	row1_column3
rowHeader_2	row2_column1	row2_column2	row2_column3