Javascript If Not Defined

The intermediary transaction SEO diagnoses Taobao guest Cloud host Technology Hall This article extracts from the website Analysis master Eric T.peterson "web site measurement Hacks" –hack#30 "HACK the JavaScript Document objec T Model "web analytics solutions are generally tagged to understand how they use JavaScript documents to ...

This article only picks one example: http://www.aliyun.com/zixun/aggregation/33906.html ">javascript" The This keyword, in simple and simple analysis its meaning in different situations, The reason for this and the method of binding this is provided in JavaScript tools such as Dojo. It can be said that the correct mastery of JavaScript in the This keyword, to calculate ...

The article uses a sample application to demonstrate DOM methods and properties and how to attach handlers to DOM events. The World Wide Web Consortium (WWW) has defined the Document Object Model (DOM) in different spec groups (DOM 1, Dom 2, and DOM level 3). The DOM represents HTML or XML as a tree that consists of nodes with different levels of properties and methods. Using the client language such as JavaScript, you can add, modify, and delete nodes in the tree ...

Base64 is one of the most commonly used encodings, such as the development of passing parameters, the <img/> tags in modern browsers to render pictures directly through Base64 strings, and for messages and so on.　　The BASE64 encoding is defined in RFC2045, which is defined as: Base64 content transfer encoding is designed to describe the 8-bit byte of any sequence as a form that is not easily recognized directly by the person. We know that any data is stored in binary form on the computer. One byte is 8 bits, one character is stored in the computer ...

The intermediary transaction SEO diagnoses Taobao guest cloud host technology Hall still has one hours to 2012, that can also have a bit of time to write a bit of spit things, hehe ... December 2011 is definitely my work since the maximum pressure of one months, has been busy to sleep less time, part-time reading less time, the body began to alarm, shoulder responsibility pressure I really breathless ... 　　As an ordinary north drift, in Beijing similar to me such a sea of humanity, especially in our industry. I love life very much, every minute is precious;

In the past few years, the innovative development of the open source world has elevated the productivity of Java™ developers to one level. Free tools, frameworks and solutions make up for once-scarce vacancies. The Apache CouchDB, which some people think is a WEB 2.0 database, is very promising. It's not difficult to master CouchDB, it's as simple as using a Web browser. This issue of Java open ...

Before this article: The dilemma of Chinese web fonts when foreign designers happily discuss how to replace fonts without pictures, when Google proudly to provide more and more web fonts, web designers using Chinese can only give a sigh. The dilemma of web fonts in the Chinese world is not only due to the large number of Chinese symbols caused by excessive font files such technical barriers; the deeper reason is that there are few good fonts available. On the one hand, although some Chinese font providers are also working to provide solutions for different platforms, word ...

Start the first article. The old rules, first boring talk about the weather. 11 long vacation, the weather finally began some autumn flavor, sitting in the room even feel the need for hot coffee. Said two years ago is also in the National Day holiday began to do Joomla document translation; Good time for a long holiday, always can spare a day or two, quiet nest in the home Do blog, learn to do something new, simply no more comfortable things. Say the right thing. Be prepared to focus on a few recent studies on the topic of "responsive web design", including concepts, practices, cases, and discussion of viewpoints. Compared to ...

Intermediary transaction SEO diagnosis Taobao guest Cloud host technology Hall embedded in your Web page navigation elements can reduce your search engine evaluation rankings and reduce the response performance of your site.　　The author of this article would like to explore with you how to use AJAX technology to solve these two problems. Many well-designed Web sites contain a large amount of navigable information associated with the actual content. HTML tags for navigation can affect your search engine evaluation, and can improve the visitor's page download experience. In this article, you'll see how to use Ajax ...

Intermediary trading SEO diagnostic Taobao customer hosting technology lobby Many people use zblog encountered many problems, I hope a lot of expansion. For those who modify and enrich the zblog program, its variables are required. It has a very large variable system, if one by one to find, exhausted individuals. I now give these posts out, I hope for everyone useful. <Zblog tags and notes>: This want to modify the length of the recently published piece of display words, looking for a long time did not find where to modify, where these labels is still useful, the first paste ...