One value, like: p {border-style: solid} - all four borders will be solid
Two values, like: p {border-style: solid dotted} - top and bottom border will be solid, left and right border will be dotted
Three values, like: p {border-style: solid dotted double}- top border will be solid, left and right border will be dotted, bottom border will be double
Four values, like: p {border-style: solid dotted double dashed} - top border will be solid, right border will be dotted, bottom border will be double, left border will be dashed

Syntax

Set the borderStyle property:

Object.style.borderStyle="value"

Return the borderStyle property:

Object.style.borderStyle

Value	Description
none	Defines no border. This is default
hidden	The same as "none", except in border conflict resolution for table elements
dotted	Defines a dotted border
dashed	Defines a dashed border
solid	Defines a solid border
double	Defines two borders. The width of the two borders are the same as the border-width value
groove	Defines a 3D grooved border. The effect depends on the border-color value
ridge	Defines a 3D ridged border. The effect depends on the border-color value
inset	Defines a 3D inset border. The effect depends on the border-color value
outset	Defines a 3D outset border. The effect depends on the border-color value
inherit	The style of the border is inherited from the parent element

Browser Support

The borderStyle property is supported in all major browsers.

Note: The value "inherit" is not supported in IE7 and earlier. IE8 requires a !DOCTYPE. IE9 supports "inherit".

Example

Change the style of the four borders:

<html>
<head>
<style type="text/css">
#ex1
{
border: thick solid #FF0000;
}
</style>
<script>
function displayResult()
{
document.getElementById("ex1").style.borderStyle="dotted double";
}
</script>
</head>
<body>

<div id="ex1">This is some text.</div>
<br>
<button type="button" onclick="displayResult()">Change style of the four borders</button>

</body>
</html>

Try it yourself »

Style Object