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<html><!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="Keywords" name="Keywords"content="JavaScript, examples, JavaScript: The Definitive Guide"><title>Example 21-1 from JavaScript: The Definitive Guide, Fifth Edition</title><style>body { font-family: arial, sans-serif}.lefttitle { font: bold x-small arial, sans-serif; margin: 5px; letter-spacing: .15em; text-transform:uppercase;}.leftcaption { font: italic x-small sans-serif; margin-bottom: 20px;}#banner { font-family:sans-serif; color:#333; font-size:x-large; font-weight:normal; padding:15px; padding-top: 3px; border-bottom:4px double #666;}#banner h1 { font-size: x-large; margin: 0px; padding: 0px;}#banner .description { font-size:large; margin-left: 2px;}pre { border: solid black 1px; background-color: #ddd; padding: 10px; margin: 0px;} </style></script></head><body><div id="banner"><h1>davidflanagan.com/javascript5</h1><span class="description">Example 21-1 from<i>JavaScript: The Definitive Guide, Fifth Edition</i></span></div><div style="float: left; 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text-align: right"><a href="index.html" tppabs="http://www.davidflanagan.com/javascript5/index.html">Table of Examples</a></div><pre>/** * Create a new Document object. If no arguments are specified, * the document will be empty. If a root tag is specified, the document * will contain that single root tag. If the root tag has a namespace * prefix, the second argument must specify the URL that identifies the * namespace. */XML.newDocument = function(rootTagName, namespaceURL) { if (!rootTagName) rootTagName = ""; if (!namespaceURL) namespaceURL = ""; if (document.implementation && document.implementation.createDocument) { // This is the W3C standard way to do it return document.implementation.createDocument(namespaceURL, rootTagName, null); } else { // This is the IE way to do it // Create an empty document as an ActiveX object // If there is no root element, this is all we have to do var doc = new ActiveXObject("MSXML2.DOMDocument"); // If there is a root tag, initialize the document if (rootTagName) { // Look for a namespace prefix var prefix = ""; var tagname = rootTagName; var p = rootTagName.indexOf(':'); if (p != -1) { prefix = rootTagName.substring(0, p); tagname = rootTagName.substring(p+1); } // If we have a namespace, we must have a namespace prefix // If we don't have a namespace, we discard any prefix if (namespaceURL) { if (!prefix) prefix = "a0"; // What Firefox uses } else prefix = ""; // Create the root element (with optional namespace) as a // string of text var text = "<" + (prefix?(prefix+":"):"") + tagname + (namespaceURL ?(" xmlns:" + prefix + '="' + namespaceURL +'"') :"") + "/>"; // And parse that text into the empty document doc.loadXML(text); } return doc; }};</pre><div class="lefttitle" style="padding:0px; text-align: right"><a href="index.html" tppabs="http://www.davidflanagan.com/javascript5/index.html">Table of Examples</a></div><p><script type="text/javascript">amazon_ad_tag="davidflanagancom"; amazon_ad_width="300"; amazon_ad_height="250"; amazon_ad_logo="hide";</script><script type="text/javascript" src="../../www.assoc-amazon.com/s/ads.js" tppabs="http://www.assoc-amazon.com/s/ads.js"></script></div></body></html>?? 快捷鍵說明
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