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1290 days ago
Friday, October 21, 2005 ajax AJAX基础教程 本文来源于(有能够提供最初翻译者的朋友吗？)： http://developer.mozilla.org/en/docs/AJAX:Getting_Started 这篇文章将带您浏览整个AJAX的基本概貌,并展示两个简单的例子让您轻松上路. 什么是 AJAX? AJAX (异步 JavaScript 和 XML) 是个新产生的术语,专为描述JavaScript的两项强大性能.这两项性能在多年来一直被网络开发者所忽略,直到最近Gmail, Google suggest和google Maps的横空出世才使人们开始意识到其重要性. 这两项被忽视的性能是: 无需重新装载整个页面便能向服务器发送请求. 对XML文档的解析和处理． 步骤 1 – "请!" --- 如何发送一个HTTP请求 为了用JavaScript向服务器发送一个HTTP请求, 需要一个具备这种功能的类实例. 这样的类首先由Internet Explorer以ActiveX对象引入, 被称为XMLHTTP. 后来Mozilla, Safari 和其他浏览器纷纷仿效, 提供了XMLHttpRequest类,它支持微软的ActiveX对象所提供的方法和属性. 因此, 为了创建一个跨浏览器的这样的类实例(对象), 可以应用如下代码: if (window.XMLHttpRequest) { // Mozilla, Safari, ... http_request = new XMLHttpRequest(); } else if (window.ActiveXObject) { // IE http_request = new ActiveXObject("Microsoft.XMLHTTP"); } (上例对代码做了一定简化,这是为了解释如何创建XMLHTTP类实例. 实际的代码实例可参阅本篇步骤3.) 如果服务器的响应没有XML mime-type header,某些Mozilla浏览器可能无法正常工作. 为了解决这个问题, ...
1301 days ago
Name Tony Whitter Bio Tony Whitter has worked as a software developer, consultant and trainer for nearly 30 years, providing solutions and advice to a wide variety of organisations and industries. He first started programming in 1975 on mini-computers, moved to mainframes in 1980, and on to PCs in 1984. After founding a technology company in the early 1980's, his extensive experience includes four years as the Head of Technology for a quoted multinational software corporation. He now runs his own software development and consultancy firm specialising in the Microsoft .NET platform. Tony has been using .NET since the PDC Technical Preview release in 2000, and has since developed a number of enterprise level systems using Visual Studio .NET, the first of which shipped in 2001 under the terms of the Go Live Licence for Beta 2. He continues to use Visual Studio .NET extensively on a daily basis and consequently has a wealth of relevant knowledge and experience to draw on. More ...1355 days ago
Chengdu From Wikipedia, the free encyclopedia Jump to: navigation , search Location within China Chengdu ( Chinese : 成都; Hanyu Pinyin : Chéngdū ; Wade-Giles : Ch'eng-tu), located in southwest China , is the capital of the Sichuan province and a sub-provincial city . It is the 4th most populous city in China and a political, cultural and economic centre of southwest China. More than four thousand years ago, the prehistorical Bronze Age culture of Jinsha ( Chinese : 金沙; Pinyin : Jīnshā ) established itself in this region. The fertile Chengdu Plain , on which Chengdu is located, is called Tianfu zhi guo ( Chinese : 天府之国; Pinyin : Tiānfŭ zhī guó ) in Chinese, which means "the Heavenly country". Contents [ hide ] 1 Population 2 History 3 Alias ...1360 days ago
The following principles are fundamental to the design and implementation of effective interfaces, whether for traditional GUI environments or the web. Of late, many web applications have reflected a lack of understanding of many of these principles of interaction design, to their great detriment. Because an application or service appears on the web, the principles do not change. If anything, applying these principles become even more important. • Deutsche (German) Version: http://meiert.com/de/publications/translations/asktog.com/firstprinciples/ • Nederlands (Dutch) Version: http://aifia.org/nl/translations/000187.html • Spanish Version: http://galinus.com/es/articulos/principios-diseno-de-interaccion.html Effective interfaces are visually apparent and forgiving, instilling in their users a sense of control. Users quickly see the breadth of their options, grasp how to achieve their goals, and do their work. Effective interfaces do not concern the ...
