原文:http://articles.techrepublic.com.com/5100-3513_11-6177545.html
This article is also available as a TechRepublic download.
Before CSS arrived, Web developers had limited control over page and element backgrounds. Sure, they could use the background attribute to tile an image over an entire page, and they could control the background color of an image with the bgcolor attribute. But their control ended there -- they couldn't, for example, adjust the position of the page background image, control the tiling, or create a page watermark.
CSS changed all that, by making it possible to precisely control page and element backgrounds via its family of background-* directives. In addition to offering greatly improved functionality, using CSS directives for background control has a number of other advantages: it doesn't require any special software, it works on most major browsers, and it allows centralized control over a site's background images and colors.
Sounds interesting? Then keep reading, because this article examines the CSS background property, which provides an alternative to the older background attribute and is a great tool for manipulating the location, color, position, and tiling of your page and element backgrounds...
本文探讨了CSS中的背景属性如何改变了网页开发者对页面及元素背景的控制方式。通过使用CSS的背景指令,开发者能够精确地调整背景图片的位置、颜色、平铺方式等特性,实现了比传统属性更强大的功能。
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