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border-top property

Specifies the properties of the top border of the object.

CSS Backgrounds and Borders Module Level 3, Section 4.4

Syntax

border-top: <border-top-width> || <border-top-style> || <border-top-color>

Property values

One or more of the following space-delimited values:

border-top-width: Any of the range of width values available to the border-top-width property.
border-top-style: Any of the range of style values available to the border-top-style property.
border-top-color: Any of the range of color values available to the border-top-color property.

CSS information

Applies To	All elements
Media	visual
Inherited	no
Initial Value	(see individual properties)

Standards information

CSS Backgrounds and Borders Module Level 3, Section 4.4

Remarks

The border-top property is a shorthand property that sets the width, color, and style values for the top border of an object.

All individual border properties not set by the shorthand border-top property are set to their initial values. For example, the initial value for width is "medium".

If a color is not specified, the text color is used.

For more information about supported colors, see the Color Table.

Examples

The following examples use the border-top CSS property and the borderTop scripting property to specify the composite properties.

This example uses a call to an embedded (global) style sheet to change the attributes of the top border when an onmouseover event occurs.

Code example: http://samples.msdn.microsoft.com/workshop/samples/author/dhtml/refs/border-top.htm

HTML


<head>
<style>
td {
  border-top: 0.5cm solid yellow;
}
.change {
  border-top: 0.5cm groove pink;
}
</style>
</head>

<body>

<table>
  <tr>
    <td onmouseout="this.className=''" onmouseover="this.className='change'">
    <img alt="sphere" src="sphere.jpg"> </td>
  </tr>
</table>

This example uses inline scripting to change the top border when an onmouseover event occurs.

Code example: http://samples.msdn.microsoft.com/workshop/samples/author/dhtml/refs/borderTop.htm