kulunviet.js

$(function(){
  //Get saved items from cookie as string
	var readedItemsFromCookie = $.cookie('readedItems'),
		readedItems = [],
		//Cache links for better performance
		newlink = $('.new a');
			
	if(readedItemsFromCookie){
		//Use split function to convert from saved string to array
		readedItems = readedItemsFromCookie.split(',');
		//Loop through saved items
		for(var i = 0; i < readedItems.length; i++){
			//Get index value from saved item
			var index  = readedItems[i],
				//use jquery .eq() function to get link item with saved index 
				link = newlink.eq(index);
			//and remove span
			link.next('span').remove();
			//add 'old' class to parent
			link.parent().addClass('old');
		}
	}
	
	//for each link, get index
	newlink.each(function(index, ele){
		//jquery cache
		var $this = $(this);
		$this.click(function(){
			//Remove icon
			$this.next('span').remove();
			//add 'old' class to parent
			$this.parent().addClass('old');
			//Add new readed item to array
			readedItems.push(index);

			//Save to cookie
			$.cookie('readedItems', readedItems.join(','));
//			return false;
		});
	});
	
	//$.cookie('readedItems','');
});