 | Cascading Style Sheets: The Definitive Guide |  |
Thursday 20th of June 2013 11:16:24 AM
When it comes right down to it, positioning is a very compelling technology. It's also likely to be an exercise in frustration if you're trying to get it to behave consistently in a
H1 {color: maroon;}BODY {background: yellow;}After the @import statement in our example, wefind some ordinarystyles. What theymean doesn't actually matter for this discussion, although youcan probably guess that they set H1 elements to be cross-browser environment. The problem isn't so much that it won't work in some browsers: it's that it will only sort of work in a number of them, such as Navigator 4 and Internet Explorer 4 and 5. It can be great fun to play with positioning, and one day we'll be able to use it in place of tables and frames while dramatically improving accessibility and backward compatibility. As of this writing, though, it remains a great way to create design prototypes, but a tricky thing to use on a public web site.
As it happens, this sentiment may be applied to the majority of CSS2, which is given an overview in the next chapter.
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| 9.5. Stacking Positioned Elements |  | 10. CSS2: A Look Ahead |
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Ignoring the fact that this would be entirely counterintuitive, what we see in Figure 5-16 is that the main paragraph text has a weight of 900 and the SPAN aweight of 700. When the STRONG text is set to lighter, it evaluates to the next-lighter face, which is the regular face, or 400 (the same as normal) on the numeric scale. The next step down is to 300, which comes out the same as normal since no lighter faces exist. From there,
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.
The border's width is, by default, medium ,as we can see in Figure 7-37. We can change that tothe result in Figure 7-38 as follows:
P {margin: 5px; background-color: silver;border-style: solid; border-width: thick;}
This can be taken to fairly ridiculous extremes, such as setting20-pixel borders as depicted in Figure 7-39: