(function($) {
	             $.fn.grade = function(gradeClass){ 
	             $(this).css('position','relative')  
	             		.html('<span class='+gradeClass+'>'+$(this).html()+'</span><span style="position:relative;">'+$(this).html()+'</span>');
	             $("."+gradeClass).height((0.6*$(this).height()));  
	             return $(this);  
	             }
	        })(jQuery);