$(document).ready(
	function(){
		if($(".new").size() > 0){
			var date = new Date();
			var ts = date.getTime();
			$(".new").each(
				function(){
					var update = $(this).attr("title");
					if(update.match(/[0-9]{4}\/[0-9]{2}\/[0-9]{2}/) != null){
						var buf_date = new Date($(this).attr("title"));
						var ref_ts = buf_date.getTime();
						var diff = ts - ref_ts;
						var week = 1000 * 60 * 60 * 24 * 7; 
						if(diff > week){
							$(this).remove();
						}
					}else{
						$(this).remove();
					}
				}
			);
		}
	}
);