測試代碼如下:
復制代碼 代碼如下:
<button value="abc">測試</button>
<script>
var btn = document.getElementsByTagName('button')[0];
alert(btn.value);
alert(btn.getAttribute('value'));
</script>
IE6/7:

IE8/9/10/Firefox/Safari/Chrome/Opera:

即:
IE6/7 中返回的是innerHTML,實現錯誤。