Footer fixed.

footer-fixed.js

/*
* === CSS ===
  .footer {
    display: block;
    clear: both;
    float: none;
    background-color: #ffffff;
    font-size: 16px;
  }
  
  .footer-fixed {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
  }
*/
$(document).ready(function () {
    $(window).resize(function () {
        pageFooterFixed();
    });

});

function pageFooterFixed() {
    var window_height = $(window).height(),
        pg_height = $('body').height(),
        footer = $('.footer');
    
    if (footer.hasClass('footer-fixed')) {
        pg_height += footer.height();
    }
    if (window_height > pg_height) {
        footer.addClass('footer-fixed');
    } else {
        footer.removeClass('footer-fixed');
    }
}