Check for group membership in Header code?

[Gunnar (Gunnar Helliesen)]

@vinothkannans

If a user’s primary group is customers then the body tag will have the CSS class primary-group-customers.

So, should this work then, if I want to display “Member!” if the user is a member of the “patrons” group?

<p id="ghjldemo">Not a member!</p>

<script type="text/javascript">
if ( document.getElementById("body").className.match(/(?:^|\s)primary-group-patrons(?!\S)/) ) {
    document.getElementById("ghjldemo").innerHTML = "Member!";
}
</script>

Thanks,
Gunnar