Tryit Editor v1.8

Source Code:

<!DOCTYPE html>
<html>
<body>
<p>This example works in Firefox only.</p>

<script>
var employees=
<employees>
<person>
    <name>Tove</name>
    <age>32</age>
</person>
<person>
    <name>Jani</name>
    <age>26</age>
</person>
</employees>;
document.write(employees.person.(name == "Tove").age); 
</script>

</body>
</html>

Result:

W3Schools.com - Try it yourself

Edit the code above and click "Submit Code" to see the result.