字母表 MP3 播放器

• A
• B
• C
• D
• E
• F
• G
• H
• I
• J
• K
• L
• M
• N
• O
• P
• Q
• R
• S
• T
• U
• V
• W
• X
• Y
• Z

<script>
	var alphabet = ['A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z'];
	var audio = new Audio();
	var timer1, timer2, timer3;

	function playMP3(file) {
		audio.src = file;
		audio.play();
	}

	function startTest() {
		clearTimeout(timer1);
		clearTimeout(timer2);
		clearTimeout(timer3);
		var i = 0;
		timer1 = setInterval(function() {
			document.getElementById('test').innerHTML = alphabet[i];
			i++;
			if (i == alphabet.length) {
				i = 0;
			}
		}, 3000);

		timer2 = setTimeout(function() {
			var letter = document.getElementById('test').innerHTML;
			playMP3(letter.toLowerCase() + '.mp3');
		}, 5000);

		timer3 = setTimeout(function() {
			document.getElementById('test').innerHTML = '';
		}, 8000);
	}
</script>

<div id='test'></div>