7. A left (or right) floating element that has anotherfloating element to its left (or right) may not have its right outeredge to the right (or left) of its containing block's right (or
Web-based applications are similar to app servers, except for one thing: Web-based applications don't have client apps, instead they use web browsers on the client side. They generate their front ends using HTML, which is dynamically generated by the web-based app. In the Java world, Servlets are best suited for this job.
Web-based apps might themselves rely on another app server to gather information that is presented on the client web browser. Also, you can write Servlets that get information from remote or local databases, XML document repositories and even other Servlets. One good use for web-based apps is to be a wrapper around an app server, so that you can allow your customers to access at least part of the services offered by your app server via a simple web browser. So web-based apps allow you to integrate many components including app servers, and provide access to this information over the web via a simple web browser.
Web-based apps are very deployable, since they don't require special Java VMs to be installed on the client side, or any other special plug ins, if the creator of the web-based app relies solely on HTML. Unfortunately, this can restrict the level of service that can be offered by a web-based app when compared to the functionality offered by custom clients of an app server, but they are a good compromise when it comes to providing web-based access to your information. In fact, in a real world scenario, both a web-based app and app server may be used together, in order to provide your customers access to their information. In an Intranet setting, you might deploy the clients that come with the app server, and in an Internet setting it would be better to deploy a web-based app that sits on top of this app server, and gives your customers (relatively) limited access to their data over the web (via a simple web browser).
When printed, of course, the two are the same, since the display area(the paper) is the same as the document size, at least for that page.In a web browser, though, the viewing area can change as the userresizes the browser's window. This will cause thebackground's origin image to shift as the windowchanges size. Figure 6-56 depicts several views ofthe same document. So in a certain sense the image isn't fixedin place, but it will remain fixed so long as the viewing areaisn't resized.