jQuery(document).ready(function() {
	var sidebarYPos = jQuery('#first-sidebar').position().top;
	jQuery(window).scroll(function(){
		var windowScroll = jQuery(window).scrollTop();
		var offset = windowScroll - sidebarYPos;

		offset = offset < 0?0:offset;

		jQuery('#first-sidebar')
			.css('position', 'relative')
			.css('top', offset +'px');
	});
});
;