Example
Change the width of the top border of a <div> element to 10px:
document.getElementById("myDiv").style.borderTopWidth = "10px";Try it Yourself »
Definition and Usage
The borderTopWidth property sets or returns the width of the top border of an element.
Browser Support
The borderTopWidth property is supported in all major browsers.
Syntax
Return the borderTopWidth property:
object.style.borderTopWidth
Set the borderTopWidth property:
object.style.borderTopWidth="thin|medium|thick|length|initial|inherit"
Property Values
| 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 |
Technical Details
| Default Value: | medium |
|---|---|
| Return Value: | A String, representing the width of an element's top border |
| CSS Version | CSS1 |
More Examples
Example
Change the width of the top border of a <div> element to thin:
document.getElementById("myDiv").style.borderTopWidth = "thin";
Try it Yourself »
Example
Return the width of the top border of a <div> element:
alert(document.getElementById("myDiv").style.borderTopWidth);
Try it Yourself »
Related Pages
CSS tutorial: CSS Border
CSS reference: border-top-width property
HTML DOM reference: border property
< Style Object