<!DOCTYPE html>
<html>
<body>
<p><q id="myQ" style="quotes:'«' '»';">This is a quote.</q></p>
<button type="button" onclick="myFunction()">Return quotation marks</button>
<script>
function myFunction() {
alert(document.getElementById("myQ").style.quotes);
}
</script>
</body>
</html>