*（星号）在CSS声明前面是什么意思？ [英] What does an * (star) mean in front of a CSS declaration?

问题描述

我在项目中使用Yahoo YUI库。任何人都可以帮助我理解在布局管理器CSS中遇到的以下CSS：

I'm using the Yahoo YUI libraries in a project. Can anyone help me understand the following CSS that I came across in the layout manager CSS:

我无法弄清楚*（star）在以下CSS中：

I have been unable to figure out what the * (star) does to the declarations in the following CSS:

.yui-skin-sam .yui-layout .yui-layout-unit div.yui-layout-bd {
border:1px solid #808080;
border-bottom:none;
border-top:none;
*border-bottom-width:0;
*border-top-width:0;
background-color:#f2f2f2;
text-align:left;
}

推荐答案

只适用于旧版本的IE
*声明的样式将覆盖新的样式元素，这些样式元素只能由Od IE取消。
http://en.wikipedia.org/wiki/CSS_filter#Star_hack

This is a hack to apply styles only to older versions of IE the * declared styles will override the new style elements , that are unsuported by Od IE only. http://en.wikipedia.org/wiki/CSS_filter#Star_hack

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