這段代碼里的這句話是干嘛用的？ newnode.appendChild(newnodeText);
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>無標題文檔</title>
</head>
<body>
<script type="text/javascript">
? ?function replaceMessage(){
? var newnode = document.createElement("p");
? var newnodeText = document.createTextNode("javascript");
? newnode.appendChild(newnodeText);
? var oldNode = document.getElementById("oldnode");
? oldNode.parentNode.replaceChild(newnode,oldNode); ??
? ?}
</script>
<h1 id="oldnode">Java</h1>
<a href="javascript:replaceMessage()">"Java"替換"Javascript"</a>
</body>
</html>
2017-05-19
前面?var newnodeText = document.createTextNode("javascript");是指創建一個內容為JavaScript的文本節點，緊接著? newnode.appendChild(newnodeText);是將創建好的這個文本節點添加為p的子節點