By Shelley Powers

Including Ajax is perfect for the intermediate to complicated net builders between you who're apprehensive and careworn approximately Ajax, pondering that it'll strength you to begin over along with your craft. This clean advisor will calm these fears via providing a completely new method of the subject. instead of introduce Ajax as a totally new approach of doing issues, this ebook exhibits you the way to combine Ajax with present websites, and does so by way of development to Ajax instead of construction from an Ajax origin. by way of analyzing this ebook, you are going to learn the way Ajax enables you to create "rich" net purposes, yet extra importantly, you will see how the practices you persist with feed correct into Ajax - and that, as a rule, you already paintings with the applied sciences concerned. including bits and items frequently makes even more feel than tearing down and rebuilding, and you may discover ways to combine Ajax along with your traditional technique. on the finish of including Ajax, there is mirrored image on even if beginning over will be a enjoyable inspiration, yet via you then could be even more ok with it.

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If you’re choosing a loosely coupled solution, it means that you’re developing your server application to provide web services that may be called by other server-side applications in addition to an Ajax application. This approach is the most disciplined because it makes no assumption about the capability of the client. A change in the client doesn’t impact the server, and a change in the implementation of the server doesn’t impact the client. If, however, you’re using a more tightly coupled approach (for example, a Java library such as Google’s Google Web Toolkit (GWT), then the tool itself is going to determine the extent of what you can do with the page or even what’s generated.

The way I provide content for mobile devices is to use a separate mobile stylesheet, which renders the content legible in a small device. We can also use this as a way of determining whether to turn off our Ajax effects. I vote for off, myself. 5 or earlier versions of IE. These earlier versions are no longer supported by Microsoft and are insecure, not to mention grossly incomplete in their implementations of standard web technology. 5 or earlier is used, there are replacements. This includes the Mac, as well as earlier versions of Windows.

Viewing the page in Figure 1-4, notice that the left column, which is the sidebar, doesn’t extend all the way down if the content isn’t long enough. This is the drawback of using CSS-positioned XHTML: the column background extends only the length of the content. One way of working around this problem is to set the same background color for all of the containers—this will hide the column length differences. Another approach (and the one I prefer) is to create an image that is the same width and color of the sidebar, and then use it as a background image for the sidebar container.

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