style borderTopWidth 属性

将 <div> 元素上边框的宽度更改为 10px：

document.getElementById("myDiv").style.borderTopWidth = "10px";

描述

borderTopWidth 属性设置或返回元素上边框的宽度。

Property
borderTopWidth	Yes	Yes	Yes	Yes	Yes

返回 borderTopWidth 属性：

object.style.borderTopWidth

设置 borderTopWidth 属性：

Value	Description
thin	Defines a thin border
medium	Defines a medium border. This is default
thick	Defines a thick border
length	The width of the border in length units
inherit	The width of the top border is inherited from the parent element
initial	Sets this property to its default value. Read about initial
inherit	Inherits this property from its parent element. Read about inherit