function readProblem(year) {
	window.open ('answersheet.php?year=' + year, 'answersheet', 'status=1,toolbar=1,width=560,height=750');
	$('cha_description').update('<img src="loading_16x16.gif" alt="Loading.." /> กำลังอ่านข้อมูล');
	var ajaxProcess = new Ajax.Updater('cha_description', 'ipaper.php', {
		method: 'get',
		parameters: 'year=' + year
	});
}

function answerProblem() {
	if (confirm('คุณแน่ใจที่จะส่งคำตอบและดูเฉลย')) {
		$('btnAnswer').disabled = true;
		var ajaxProcess = new Ajax.Request('do.php', {
			method: 'post',
			parameters: $('form1').serialize(),
			onComplete: function(transport) {
				var result = transport.responseText.split(',');
				alert('คุณได้ '+ result[0] +' จากทั้งหมด 50 คะแนน');
				for (var i=1; i<=50; i++) {
					if (result[i] == '1') 
						$('judge-'+i).update('<img src="correct.gif" alt="Correct" />');
					else if (result[i] == '0')
						$('judge-'+i).update('<img src="wrong.gif" alt="Wrong" />');
					else
						$('judge-'+i).update('<img src="free.gif" alt="Free" />');
				}
				$('btnAnswer').disabled = false;
				$('finished').update(result[51]);
			}
		});
	}
}