Works at loading and resizing

resize_and_load

$(document).load($(window).bind("resize", listenWidth));

function listenWidth( e ) {
    var windowWidth = $(window).width();
    if (windowWidth > 767) {
        stick();
    }
    else {
        unstick();
    }
}

listenWidth();  // Add this here to execute the funtion onload.