(function($){
    $.fn["wrapScroll"]=function(){
        var elements=this;
	    var $sidebar	= elements,
		$window		= $(window),
		offset		= $sidebar.offset(),
		topPadding	= 0;

	$window.scroll(function() {
		if ($window.scrollTop() > offset.top) {
			$sidebar.stop().animate({
				"marginTop":$window.scrollTop() - offset.top + topPadding
			});
		} else {
			$sidebar.stop().animate({
				"marginTop":0
			});
		}
	});
    };
})(jQuery);