1.创建节点并添加内容:使用的方法:createElement和createTextNode
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>HTML DOM</title>
<script type=text/javascript>
function Message()
{
var op=document.createElement("p");
var oText=document.createTextNode("hello world!");
op.appendChild(oText);
document.body.appendChild(op);
}
</script>
</head>
<body onload="Message();">
</body>
</html>
2,删除节点 方法:getElementsByTagName和removeChild
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>HTML DOM</title>
<script type=text/javascript>
function removeMessage()
{
var op=document.body.getElementsByTagName("p")[0];
op.parentNode.removeChild(op);
}
</script>
</head>
<body onload="removeMessage();">
<p>hello world!</p>
</body>
</html>
3.替换节点 方法replace(new,old)
<html>
<head>
<meta htt
