$(function(){
	// passage time
	var passageDate = 30;
	// current date
	var currentDate = new Date();
	$('dt').each(function(){
		var dateList = $(this).attr('id').split('-');
		
		var entryYY = dateList[0];
		var entryMM = dateList[1] - 1;
		var entryDD = dateList[2];
		
		if ( currentDate.getFullYear() == entryYY && currentDate.getMonth() == entryMM ) {
			if ( Math.abs(currentDate.getDate() - entryDD) <= passageDate ) {
				$(this).addClass('new');
			}
		}
	});
});