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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 19-1 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 19-1 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><script src="Cookie.js"></script><!-- include the cookie class --><script>// Create the cookie we'll use to save state for this web page.var cookie = new Cookie("vistordata");// First, try to read data stored in the cookie. If the cookie doesn't // exist yet (or doesn't have the data we expect), query the userif (!cookie.name || !cookie.color) { cookie.name = prompt("What is your name:", ""); cookie.color = prompt("What is your favorite color:", "");}// Keep track of how many times this user has visited the pageif (!cookie.visits) cookie.visits = 1;else cookie.visits++;// Store the cookie data, which includes the updated visit count. We set// the cookie lifetime to 10 days. Since we don't specify a path, this// cookie will be accessible to all web pages in the same directory as this// one or "below" it. We should be sure, therefore that the cookie// name, "visitordata" is unique among these pages.cookie.store(10);// Now we can use the data we obtained from the cookie (or from the// user) to greet a user by name and in her favorite color.document.write('<h1 style="color:' + cookie.color + '">' + 'Welcome, ' + cookie.name + '!' + '</h1>' + '<p>You have visited ' + cookie.visits + ' times.' + '<button onclick="window.cookie.remove();">Forget Me</button>');</script></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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