示例：如何根据值=“美国”定位下面的输入
<input type="text" value="United States" />
解决方法
正如npup在他的答案中解释的，一个简单的css规则将只定向属性值，这意味着这不覆盖html节点的实际值。
JAVASCRIPT的救援！
> Ugly解决方法：http://jsfiddle.net/QmvHL/
原始答案
是的，这是非常可能的，使用css属性选择器，你可以通过这种方式引用输入的值：
input[value="United States"] { color: #F90; }
from the reference
[att] Match when the element sets the “att” attribute,whatever the
value of the attribute.[att=val] Match when the element’s “att”
attribute value is exactly “val”.[att~=val] Represents an element
with the att attribute whose value is a white space-separated list of
words,one of which is exactly “val”. If “val” contains white space,
it will never represent anything (since the words are separated by
spaces). If “val” is the empty string,it will never represent
anything either.[att|=val] Represents an element with the att
attribute,its value either being exactly “val” or beginning with
“val” immediately followed by “-” (U+002D). This is primarily intended
to allow language subcode matches (e.g.,the hreflang attribute on the
a element in HTML) as described in BCP 47 ([BCP47]) or its successor.
For lang (or xml:lang) language subcode matching,please see the :lang
pseudo-class.
