### 返回值:IntegerscrollTop([val])
### 概述
獲取匹配元素相對滾動條頂部的偏移。
此方法對可見和隱藏元素均有效。
### 參數
#### **val**String, Number*V1.2.6*
設定垂直滾動條值
### 示例
#### 無參數描述:
獲取第一段相對滾動條頂部的偏移
##### HTML 代碼:
~~~
<p>Hello</p><p>2nd Paragraph</p>
~~~
##### jQuery 代碼:
~~~
var p = $("p:first");
$("p:last").text( "scrollTop:" + p.scrollTop() );
~~~
##### 結果:
~~~
<p>Hello</p><p>scrollTop: 0</p>
~~~
#### 參數val 描述:
設置相對滾動條頂部的偏移
##### jQuery 代碼:
~~~
$("div.demo").scrollTop(300);
~~~
- 速查表
- 核心
- jQuery(selector,[context])
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- 關于
- 關于jQuery API 文檔
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