build your own ajax web applications PHẦN 7 potx

... that you’ve seen a few AJAX applications at work, you might have an idea of another potential problem with AJAX- style web applications: the process of making updates to a web page in small pieces ... shared by many, many people who have used AJAX applications. Your goal as an AJAX application developer should be to eliminate that possibility by using AJAX only in situation...

Ngày tải lên: 12/08/2014, 09:21

... E-Commerce Service 174 The Client Class 175 Initial Setup 176 Cross-site AJAX 177 XMLHttpRequest and Security 177 An AJAX Relay 178 The Proxy Script 179 Sending the Request to Amazon Web Services 182 Getting ... and show you how to develop AJAX web applications of your own. AJAX Web Applications AJAX can be a great solution for many web development projects—it...

Ngày tải lên: 12/08/2014, 09:21

... extra effort on your part can save your users significant time and effort in the long run. Indeed, it’s this kind of attention to usability detail that separates the good AJAX applications from ... of the target URL. Doing so using our Ajax library is easy: var ajax = new Ajax( ); var handlerFunc = function(str) { // Do something with the response } ajax. doGet('/some_url....

Ngày tải lên: 12/08/2014, 09:21

... to create accessible user interfaces for your AJAX applications. Just as you wouldn’t develop your site in Firefox and deploy it without testing it in your other supported browsers (especially ... chapter. http://www.webaim.org/ WebAIM is a non-profit organization within the Center for Persons with Disabilities at Utah State University. http://www.w3.org/WAI/ The World Wide Web Co...

Ngày tải lên: 12/08/2014, 09:21

... specific to AJAX applications. Any web app that provides multiple people with access to the same data will experience concurrency issues, but using AJAX may magnify its effects in your users’ ... the content’s state on the server. This is a bigger issue with AJAX applications than it is with old-fashioned web apps, because AJAX applications make changes to data in small pie...

Ngày tải lên: 12/08/2014, 09:21

... search history. Building your own Back Button The most straightforward way to solve the Back button problem is to add your own navigation right into the application—to put your own Back and Forward buttons ... is To get your own keys, you’ll need to sign up on eBay’s Developers’ Program web site. 6 Once you’ve signed up, instructions on how to get your keys will be emaile...

Ngày tải lên: 12/08/2014, 09:21

... the one shown in Figure 3.3, or you see the timeout message shown in Figure 3.4. Figure 3.3. A response received by your AJAX application Don’t worry if you receive the timeout message shown in ... appmonitor2.html in your web browser, click Start, and wait for fakeserver.php to wake from its sleep and send ok back to your page. You can expect one of two outcomes: either a response...

Ngày tải lên: 12/08/2014, 09:21

... web application login By AJAX- ifying a web application’s login form you can provide your users an ex- perience that’s much closer to that of a traditional desktop application than a typical web ... begin to ask how to achieve a task using AJAX when they should first ask if they should achieve that task using AJAX. You should only pull AJAX out of your web development toolb...

Ngày tải lên: 12/08/2014, 09:21

... specific to AJAX applications. Any web app that provides multiple people with access to the same data will experience concurrency issues, but using AJAX may magnify its effects in your users’ ... the content’s state on the server. This is a bigger issue with AJAX applications than it is with old-fashioned web apps, because AJAX applications make changes to data in small pie...

Ngày tải lên: 12/08/2014, 09:21

... search history. Building your own Back Button The most straightforward way to solve the Back button problem is to add your own navigation right into the application—to put your own Back and Forward buttons ... doing behind the scenes. 7 http://sandbox.ebay.com/ 216 Chapter 7: More Web Services and a Back Button Licensed to siowchen@darke.biz var enable = false; self .ajax...

Ngày tải lên: 12/08/2014, 09:21