[jQuery] IS condition true like an if statement?

[Pete]

I'm trying to create a link that when clicked will produce an alert if
there are any visible divs (all .detail divs are hidden by default).
I have the following function but it doesn't seem I'm doing it
correctly; nothing happens regardless of the visibility status of the
divs.

$("a.saveConfig").click(function() {
                        $('div.detail').is(':visible'), (function () {
                alert('Hey this works');

                 });
     });


Is there a better way to do an if statement using JQuery selectors or
is there something I'm missing in my code?