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Test Info:

<!DOCTYPE html>
<meta charset="utf-8">
<title>HTMLLegendElement Test: form</title>
<link rel="author" title="Intel" href="http://www.intel.com/">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<div id="log"></div>
<div style="display:none">
<form id="testform">
<legend id="testlegend">radio</legend>
</form>
</div>
<div style="display:none">
<form id="testformWithFieldSet">
<fieldset>
<legend id="legendWithFieldSet">radio</legend>
</fieldset>
</form>
</div>
<script>
test(function () {
var legendEle = document.getElementById("legendWithFieldSet");
assert_not_equals(legendEle.form, null);
assert_equals(legendEle.form, document.getElementById("testformWithFieldSet"));
}, "Check if legend.form returns its parent when it's inside a fieldset");
test(function () {
var legendEle = document.getElementById("testlegend");
assert_equals(legendEle.form, null);
}, "Check if legend.form return null when legend has no fieldset element as its parent");
</script>