<button id="pause" onclick="changeImage()"><img id="image" src="pause.png"></button> <script> var button = document.getElementById("pause"); var image = document.getElementById("image"); function changeImage() { var imageUrl = image.getAttribute("src"); if (imageUrl === "pause.png") { image.setAttribute("src", "play.png"); } else { image.setAttribute("src", "pause.png"); } } </script> <script> var pauseEle = document.getElementById("pause"); pauseEle.onclick = function() { if (pauseEle.alt === 'Pause') { test.pauseAudio(); } else { test.playAudio(); } } </script> 优化这三段代码

<button id="pause" onclick="changeImage()"><img id="image" src="pause.png"></button>
<script>
var image = document.getElementById("image");

function changeImage() {
var imageUrl = image.getAttribute("src");
if (imageUrl === "pause.png") {
image.setAttribute("src", "play.png");
} else {
image.setAttribute("src", "pause.png");
}
}

var pauseEle = document.getElementById("pause");
pauseEle.onclick = function() {
if (pauseEle.alt === 'Pause') {
test.pauseAudio();
} else {
test.playAudio();
}
}
</script>

我简化了代码，移除了不必要的变量和重复的代码行。不过请注意，这可能会影响到其他部分代码的正确性，所以在修改代码时请谨慎。