<p id="p"></p> //id唯一
<p name="p"></p> //name不唯一 (数组)
<a></a> //tagname (数组)
getAttribute() --获取元素属性
setAttribute() --设置元素属性
<!DOCTYPE html>
<html>
<head>
<title></title>
<meta charset="utf-8">
</head>
<body>
<a id="aid" title="yeah">hi</a>
<a id="aid2"></a>
<script type="text/javascript">
function getAttr(){
var b = document.getElementById("aid");
var a = b.getAttribute("title");
alert(a);
}
function setAttr(){
var c = document.getElementById("aid2");
var d = c.setAttribute("title","233");
var e = c.getAttribute("title");
alert(e);
}
setAttr();
</script>
</body>
</html>
childNodes 访问子节点
parentNodes 访问父节点 nodeName nodeType
<!DOCTYPE html>
<html>
<head>
<title></title>
<meta charset="utf-8">
</head>
<body>
<script type="text/javascript">
function createNode(){
var body = document.body;
var input = document.createElement("input");
input.type = "button";
input.value = "按钮";
body.appendChild(input);
}
createNode();
</script>
</body>
</html>