## counter-increment 屬性
### 屬性定義及使用說明
counter-increment屬性遞增一個或多個計數器值。
counter-increment屬性通常用于counter-reset屬性和content屬性。
JavaScript 語法:object.style.counterIncrement="subsection"
## 屬性值
| 值 | 說明 |
| :-- | :-- |
| none | 沒有計數器將遞增 |
| *id number* | id 定義將增加計數的選擇器、id 或 class。number 定義增量。number 可以是正數、零或者負數。 |
| inherit | 指定counter-increment屬性的值,應該從父元素繼承 |
* * *
## 實例--對部分和子部分進行編號(比如 "Section 1"、"1.1"、"1.2")的方法:
```
<!DOCTYPE html>
<html>
<head>
<style>
body {counter-reset:section;}
h1 {counter-reset:subsection;}
h1:before
{
counter-increment:section;
content:"Section " counter(section) ". ";
}
h2:before
{
counter-increment:subsection;
content:counter(section) "." counter(subsection) " ";
}
</style>
</head>
<body>
<p><b>Note:</b> IE8 supports these properties only if a !DOCTYPE is specified.</p>
<h1>HTML tutorials</h1>
<h2>HTML Tutorial</h2>
<h2>XHTML Tutorial</h2>
<h2>CSS Tutorial</h2>
<h1>Scripting tutorials</h1>
<h2>JavaScript</h2>
<h2>VBScript</h2>
<h1>XML tutorials</h1>
<h2>XML</h2>
<h2>XSL</h2>
</body>
</html>
```
- CSS常用樣式控制
- background--背景
- Text--文本
- CSS屬性
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