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+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>Stack parameters</title>
+<link rel="help" href="http://www.mathml-association.org/MathMLinHTML5/S3.html#SS3.SSS2">
+<meta name="assert" content="Element mfrac correctly uses the stack parameters from the MATH table.">
+<!-- Copyright 2016 MathML Association
+     Licensed under 3-Clause BSD-License -->
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<style>
+  math, mspace {
+    font-size: 10px;
+  }
+  @font-face {
+    font-family: axisheight7000;
+    src: url("fonts/stack-axisheight7000.woff");
+  }
+  @font-face {
+    font-family: bottomdisplaystyleshiftdown5000;
+    src: url("fonts/stack-bottomdisplaystyleshiftdown5000.woff");
+  }
+  @font-face {
+    font-family: bottomshiftdown6000;
+    src: url("fonts/stack-bottomshiftdown6000.woff");
+  }
+  @font-face {
+    font-family: displaystylegapmin4000;
+    src: url("fonts/stack-displaystylegapmin4000.woff");
+  }
+  @font-face {
+    font-family: gapmin8000;
+    src: url("fonts/stack-gapmin8000.woff");
+  }
+  @font-face {
+    font-family: topdisplaystyleshiftup3000;
+    src: url("fonts/stack-topdisplaystyleshiftup3000.woff");
+  }
+  @font-face {
+    font-family: topshiftup9000;
+    src: url("fonts/stack-topshiftup9000.woff");
+  }
+</style>
+<script>
+  var emToPx = 10 / 1000; // font-size: 10px, font.em = 1000
+  var epsilon = 1;
+
+  function getBox(aId) {
+    return document.getElementById(aId).getBoundingClientRect();
+  }
+
+  var test_loaded = async_test("Page Loaded");
+  window.addEventListener("load", function() {
+    // FIXME: Use an API to wait for the Web fonts to arrive.
+    window.setTimeout(runTests, 250);
+  });
+
+  function runTests() {
+    test(function() {
+      var v = 7000 * emToPx;
+      assert_approx_equals(getBox("ref0001").top - getBox("num0001").bottom,
+                           v, epsilon, "mfrac: axis height");
+    }, "AxisHeight");
+
+    test(function() {
+      var v = 5000 * emToPx;
+      assert_approx_equals(getBox("den0002").top - getBox("ref0002").bottom,
+                           v, epsilon, "mfrac: denominator shift");
+    }, "BottomDisplayStyleShiftDown");
+
+    test(function() {
+      var v = 6000 * emToPx;
+      assert_approx_equals(getBox("den0003").top - getBox("ref0003").bottom,
+                           v, epsilon, "mfrac: denominator shift");
+    }, "BottomShiftDown");
+
+    test(function() {
+      var v = 4000 * emToPx;
+      assert_approx_equals(getBox("den0004").top - getBox("num0004").bottom,
+                           v, epsilon, "mfrac: gap");
+    }, "DisplayStyleGapMin");
+
+    test(function() {
+      var v = 8000 * emToPx;
+      assert_approx_equals(getBox("den0005").top - getBox("num0005").bottom,
+                           v, epsilon, "mfrac: gap");
+    }, "GapMin");
+
+    test(function() {
+      var v = 3000 * emToPx;
+      assert_approx_equals(getBox("ref0006").top - getBox("num0006").bottom,
+                           v, epsilon, "mfrac: numerator shift");
+    }, "TopDisplayStyleShiftUp");
+
+    test(function() {
+      var v = 9000 * emToPx;
+      assert_approx_equals(getBox("ref0007").top - getBox("num0007").bottom,
+                           v, epsilon, "mfrac: numerator shift");
+    }, "ToShiftUp");
+
+    test_loaded.done();
+  }
+</script>
+</head>
+<body>
+  <p>
+    <math style="font-family: axisheight7000;">
+      <mspace id="ref0001" depth="1em" width="3em" mathbackground="green"/>
+      <mfrac linethickness="0px">
+        <mspace width="3em" height="1em" id="num0001" mathbackground="blue"/>
+        <mspace width="3em"/>
+      </mfrac>
+    </math>
+  </p>
+  <hr/>
+  <p>
+    <math display="block" style="font-family: bottomdisplaystyleshiftdown5000;">
+      <mspace id="ref0002" width="3em" height="1em" mathbackground="green"/>
+      <mfrac linethickness="0px">
+        <mspace width="3em"/>
+        <mspace width="3em" depth="1em" id="den0002" mathbackground="blue"/>
+      </mfrac>
+    </math>
+  </p>
+  <hr/>
+  <p>
+    <math style="font-family: bottomshiftdown6000;">
+      <mspace id="ref0003" width="3em" height="1em" mathbackground="green"/>
+      <mfrac linethickness="0px">
+        <mspace width="3em"/>
+        <mspace width="3em" depth="1em" id="den0003" mathbackground="blue"/>
+      </mfrac>
+    </math>
+  </p>
+  <hr/>
+  <p>
+    <math display="block" style="font-family: displaystylegapmin4000;">
+      <mfrac linethickness="0px">
+        <mspace width="3em" height="1em" id="num0004" mathbackground="blue"/>
+        <mspace width="3em" depth="1em" id="den0004" mathbackground="green"/>
+      </mfrac>
+    </math>
+  </p>
+  <hr/>
+  <p>
+    <math style="font-family: gapmin8000;">
+      <mfrac linethickness="0px">
+        <mspace width="3em" height="1em" id="num0005" mathbackground="blue"/>
+        <mspace width="3em" depth="1em" id="den0005" mathbackground="green"/>
+      </mfrac>
+    </math>
+  </p>
+  <hr/>
+  <p>
+    <math display="block" style="font-family: topdisplaystyleshiftup3000;">
+      <mspace id="ref0006" width="3em" depth="1em" mathbackground="green"/>
+      <mfrac linethickness="0px">
+        <mspace width="3em" height="1em" id="num0006" mathbackground="blue"/>
+        <mspace width="3em"/>
+      </mfrac>
+    </math>
+  </p>
+  <hr/>
+  <p>
+    <math style="font-family: topshiftup9000;">
+      <mspace id="ref0007" width="3em" depth="1em" mathbackground="green"/>
+      <mfrac linethickness="0px">
+        <mspace width="3em" height="1em" id="num0007" mathbackground="blue"/>
+        <mspace width="3em"/>
+      </mfrac>
+    </math>
+  </p>
+  <hr/>
+</body>
+</html>