<body>
<div>
<div>
<span type1="a">
good
</span>
</div>
</div>
<input type=button value='查看good' onclick="alert(document.getElementsByTagName('span')[0].innerText);">
<input type=button value='查看a' onclick="alert(document.getElementsByTagName('span')[0].type1);">
</body>
<div>
<div>
<span type1="a">
good
</span>
</div>
</div>
<input type=button value='查看good' onclick="alert(document.getElementsByTagName('span')[0].innerText);">
<input type=button value='查看a' onclick="alert(document.getElementsByTagName('span')[0].type1);">
</body>
for (var i=0;i<document.elements.length;i++)
{
....
}2.利用getElementsByTagName[ID].innerHTMl可以获取元素的值
<div>
<div>
<span type1="a">
good
</span>
</div>
</div>
</body>
<script>
//取得第一个span标记内的数据
alert(document.getElementsByTagName("span")[0].innerHTML);
//取得属性值
alert(document.getElementsByTagName("span")[0].getAttribute("type1"));
</script>
document.getElementsByTagName("span")[0].getAttribute("type1") 取得属性值