Window Resize not firing Javascript/Jquery

Hi,

I have a jquery/javascript function that works great if you reload the page.  I would like to get this function in an OnReady function, but not sure if that is possible.  When reloading, after changing the screen dimension the function fires.  However, if you just do a resize of the window it does not.  I need it to fire everytime the window is resized.

    <script type="text/javascript">

        var eventFired = 0;
        if ($(window).width() < 960) {


            $(".topItems").hide();
            $(".siteBanner").hide();

        alert('Less than 960 - mobilized');

        } else {
            alert('More than 960 - demobilized');
            eventFired = 1;
        }

                    $(".topItems").hide();
                    $(".siteBanner").hide();

                    alert('Less than 960 resize - mobilized');
                } else {
                    alert('More than 960 resize');
                }
            }
        });

    </script>

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