Conditional Fixed Position

(function($){

	"use strict";

	function tjk_fixed_width(){	
		
		var widget_area = $('div.widget-area'),
		    widget_text = widget_area.find('aside.widget.widget_text');
		
		if(window.scrollTop > widget_area.height()){
			widget_text.addClass('f-wid');
		} else {
			widget_text.removeClass('f-wid');
		}
	}
	
	$('window').on('scroll', function(){
		tjk_fixed_width();
	});
	

})(jQuery);