diff --git a/mozilla/layout/html/tests/table/interactive/bug8398.html b/mozilla/layout/html/tests/table/interactive/bug8398.html
new file mode 100644
index 00000000000..12b3f254731
--- /dev/null
+++ b/mozilla/layout/html/tests/table/interactive/bug8398.html
@@ -0,0 +1,56 @@
+<!doctype html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
+<html>
+  <head>
+    <title>Show/Hide</title>
+<script type="text/javascript">
+
+///////////////////////////////////////////// 
+function ShowHide() 
+{ 
+  statusCell = GetTextCell("Cell_0"); 
+  statusCell.data = "Hello"; 
+} 
+/////////////////////////////////////////////
+function GetTextCell(aName) 
+{ 
+  var node = document.getElementById(aName); 
+  if (node != null) 
+  {
+    if (node.hasChildNodes) 
+    { 
+      var children = node.childNodes;
+      var length = children.length;
+      var count = 0;
+      
+      while(count < length)
+      {
+        child = children[count];
+        if (child.nodeType == 3)
+        {
+          dump("found kid\n");
+          return child;
+        }
+        count++ 
+      }
+    } 
+  } 
+  return null; 
+} 
+
+</script>
+  </head>
+The caption should be at the bottom
+<BR>
+  <body>
+    <form method="POST" name="myform" action="">
+      <input type="button" value="Show/Hide" onclick="ShowHide()">
+      <table border="2">
+        <caption align="bottom">Caption text</caption>
+        <tbody>
+          <tr>
+            <td id="Cell_0">
+              &nbsp;
+      </table>
+    </form>
+  </body>
+</html>
