详解在网页上通过JS实现文本的语音朗读

http://tts.baidu.com/text2audio?lan=zh&ie=UTF-8&spd=2&text=你要转换的文字

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
	<head>
		<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
		<title>百度语音测试</title>
		<script type="text/javascript"> 
		function doTTS(){
			var ttsDiv = document.getElementById('bdtts_div_id');
			var ttsAudio = document.getElementById('tts_autio_id');
			var ttsText = document.getElementById('ttsText').value;
			
			// 这样为什么替换不了播放内容
			/*var ssrcc = 'http://tts.baidu.com/text2audio?lan=zh&ie=UTF-8&spd=10&text='+ttsText;
			document.getElementById('tts_source_id').src=ssrcc;*/
			
			// 这样就可实现播放内容的替换了
			ttsDiv.removeChild(ttsAudio);
			var au1 = '<audio id="tts_autio_id" autoplay="autoplay">';
			var sss = '<source id="tts_source_id" src="http://tts.baidu.com/text2audio?lan=zh&ie=UTF-8&spd=9&text='+ttsText+'" type="audio/mpeg">';
			var eee = '<embed id="tts_embed_id" height="0" width="0" src="">';
			var au2 = '</audio>';
			ttsDiv.innerHTML = au1 + sss + eee + au2;
			
			ttsAudio = document.getElementById('tts_autio_id');
			
			ttsAudio.play();
		}
		</script>
	</head>
	<body>
		<div>
			<input type="text" id="ttsText">
			<input type="button" id="tts_btn" onclick="doTTS()" value="播放">
		</div>
		<div id="bdtts_div_id">
			<audio id="tts_autio_id" autoplay="autoplay">
				<source id="tts_source_id" src="http://tts.baidu.com/text2audio?lan=zh&ie=UTF-8&spd=9&text=播报内容" type="audio/mpeg">
				<embed id="tts_embed_id" height="0" width="0" src="">
			</audio>
		</div>
	</body>
</html>