Push footer to bottom when page is not full

Question

I\'m developing a mobile web app. This is the main structure from top to bottom: header div, menu div, content div, footer div. The header, menu and footer are constant and page

Answer 1

    function autoHeight() {
        var h = $(document).height() - $('body').height();
        if (h > 0) {
            $('#footer').css({
                marginTop: h
            });
        }
    }
    $(window).on('load', autoHeight);