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                # XML DOM 遍歷節點樹 遍歷(Traverse)意味著在節點樹中進行循環或移動。 ## 遍歷節點樹 通常您想要循環 XML 文檔,比如:當您需要提取每個元素的值時。 這叫做"遍歷節點樹"。 下面的實例遍歷 &lt;book&gt; 的所有子節點,并顯示他們的名稱和值: ## 實例 ``` <html> <head> <script src="loadxmlstring.js"></script> </head> <body> <script> text="<book>"; text=text+"<title>Everyday Italian</title>"; text=text+"<author>Giada De Laurentiis</author>"; text=text+"<year>2005</year>"; text=text+"</book>"; xmlDoc=loadXMLString(text); // documentElement always represents the root node x=xmlDoc.documentElement.childNodes; for (i=0;i<x.length;i++) { document.write(x[i].nodeName); document.write(": "); document.write(x[i].childNodes[0].nodeValue); document.write(" "); } </script> </body> </html> ``` 輸出: ``` title: Everyday Italian author: Giada De Laurentiis year: 2005 ``` 實例解釋: 1. [loadXMLString()](dom-loadxmldoc.html) 把 XML 字符串載入 xmlDoc 中 2. 獲取根元素的子節點 3. 輸出每個子節點的節點名稱以及文本節點的節點值
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