$(document).ready( function (){
	    var $sidebar   = $(".rightColumn"),
	        $window    = $(window),
	        offset     = $sidebar.offset(),
	        topPadding = 15;

	    $window.scroll(function() {
	        if ($window.scrollTop() > offset.top) {
	            $sidebar.stop().animate({
	                marginTop: $window.scrollTop() - offset.top + topPadding
	            });
	        } else {
	            $sidebar.stop().animate({
	                marginTop: 10
	            });
	        }
	    });

});