footer.jsp

<script>
    function adjustFooter(){
        var viewPortHeight = $(window).height();

        var footerHeight= $("footer").outerHeight(true);
        var contentHeight = $("main").outerHeight(true);
        var headerHeight = $("header").outerHeight(true);

        console.log(contentHeight  )
        console.log(footerHeight  )
        console.log(headerHeight  )
        console.log(viewPortHeight )
        if( contentHeight + headerHeight + footerHeight < viewPortHeight){
            $("footer").addClass("fixed")
        }
        return 1;
    }
    window.onresize = adjustFooter;
    $(document).ready(adjustFooter);
</script>