(DWS系列)一、YUI 2: Grids CSS
The foundational YUI Grids CSS offers four preset page widths, six preset templates, and the ability to stack and nest subdivided regions of two, three, or four columns. The 4kb file provides over 1000 page layout combinations. Other features include:
- Supports fluid-width (100%) layouts as well as preset fixed-width layouts at 750px, 950px, and 974px, and the ability to easily customize to any number.
- Supports easy customization of the width for fixed-width layouts.
- Flexible in response to user initiated font-size adjustments.
- Template columns are source-order independent, so you can put your most important content first in the markup layer for improved accessibility and search engine optimization (SEO).
- Self-clearing footer. No matter which column is longer, the footer stays at the bottom.
- Layouts less than 100% are automatically centered.
- Accommodates IAB’s Ad Unit Guidelines for common ad dimensions.
- Offers full A-grade browser support.
访问地址：
http://developer.yahoo.com/yui/grids/
YUI样式表矩阵，提供了预置的页面宽度，六种页面布局模板，两栏式，三栏式，四栏式供用户自由选择。4kb大小的样式表，可以自由组合千余种变化。
更多特性：
1、750px, 950px, 974px ,100%等宽的页面宽度，同时用户可以自己定义宽度
2、自定义层宽度非常自由和简易
3、校正浏览器的文字大小
4、专为seo优化，你可以把重要的文字内容置于第一个层里面
5、自净式底部，始终呆在它该待的地方 （底部）
6、层自动居中
7、融合各种广告尺寸
8、各浏览器良好的兼容性
