$(document).ready(function() {

    function handleResize(event) {
        $("#leaving-content").css("margin-top", $(document).scrollTop() + $(window).height()/2 - 100);
    }

    $("#leaving-cancel").click(function(event) {
        event.preventDefault();
        $("#leaving-popup").hide();
        $(window).unbind("resize");
        $(window).unbind("scroll");
    });

    $(".external-link").click(function(event) {
        event.preventDefault();
        handleResize(null);
        $(window).bind("resize scroll", handleResize);
        $("#leaving-continue").attr("href", $(this).attr("href"));
        $("#leaving-popup").fadeIn();
    });

    $("#leaving-continue").click(function() {
        $("#leaving-popup").fadeOut();
    });

});