// sticky footer plugin
(function($){
var footer;

$.fn.extend({
stickyFooter: function(options) {
footer = this;

positionFooter();

$(window)
.scroll(positionFooter)
.resize(positionFooter);

function positionFooter() {
var docHeight = $(document.body).height() - $("#sticky-footer-push").height();
if(docHeight < $(window).height()){
var diff = $(window).height() - docHeight;
if (!$("#sticky-footer-push").length > 0) {
$(footer).before('<div id="sticky-footer-push"></div>');
}
$("#sticky-footer-push").height(diff);
}
}
}
});
})(jQuery);