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(function() {
    var footer = document.getElementById("footer");
    var footer_stat = "normal";
    var footer_anchor = document.getElementById("footer_anchor");
    function footer_drop() {
        footer_h = footer.clientHeight;
        var rect = footer_anchor.getBoundingClientRect();
        footer_offset = rect.top;
        min_ofset = window.innerHeight - footer_h;
        if (window.innerHeight <= $(window).height()) {
            if (min_ofset > footer_offset) {
                if (footer_stat === "normal") {
                    footer.style.position = "fixed";
                    footer.style.bottom = "0";
                    footer.style.width = "100%";
                    footer_stat = "fixed";
                }
            } else {
                if (footer_stat === "fixed") {
                    footer.style.position = "static";
                    footer_stat = "normal";
                }
            }
        }
    }
    $( window ).on('load', function() {
        footer_drop();
    });
    $( window ).resize(function() {
        console.log("test");
        footer_drop();
    });
})();