<html xmlns="http://www.w3.org/1999/xhtml">
<head>
</head>
<body>
<script>
function myFunction() {
var btn1 = document.getElementById("btn1");
alert(btn1.innerText); //我是按钮
alert(btn1.innerHTML); //我是按钮
alert(btn1.value); //空，按钮不能用Value!
btn1.value = "value"; //按钮不可以这样改变值
btn1.innerText = "innerText"; //按钮可以用innerText改变值
btn1.innerHTML = "innertHTML"; //按钮也可以用 innerHTML改变值
var input1 = document.getElementById("input1");
alert(input1.value); //可以获取值
alert(input1.innerText); //没有值
alert(input1.innerHTML); //没有值
input1.value = 5; //可以改变值
input1.innerText = 6; //不可以改变值
input1.innerHTML = 7; //不可以改变值
var html2 = document.getElementById("test");
alert(test.innerHTML); // <span style="color:red">test1</span> test2
alert(test.innerText); //test1 test2
alert(test.outerHTML);
//结果如下：
//<div id="test">
// <span style="color:red">test1</span> test2
//</div>
}
</script>
<input id="input1" type="text" />
<button id="btn1" type="button" onclick="myFunction()">
我是按钮</button>
<p id="mess">
</p>
<div id="test">
<span style="color: red">test1</span> test2
</div>
</body>
</html>
