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Style borderTopWidth Property
Style Object
Definition and Usage
The borderTopWidth property sets or returns the width of the top border of an element.
Syntax
Set the borderTopWidth property:
Object.style.borderTopWidth="thin|medium|thick|length|inherit"
Return the borderTopWidth property:
Object.style.borderTopWidth
| 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 |
Browser Support
The borderTopWidth 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
Example
Change the width of the top border:
<html>
<head>
<style type="text/css">
#ex1
{
border: 1px solid #FF0000;
}
</style>
<script>
function displayResult()
{
document.getElementById("ex1").style.borderTopWidth="thick";
}
</script>
</head>
<body>
<div id="ex1">This is some text.</div>
<br>
<button type="button" onclick="displayResult()">Change width of top border</button>
</body>
</html>
<head>
<style type="text/css">
#ex1
{
border: 1px solid #FF0000;
}
</style>
<script>
function displayResult()
{
document.getElementById("ex1").style.borderTopWidth="thick";
}
</script>
</head>
<body>
<div id="ex1">This is some text.</div>
<br>
<button type="button" onclick="displayResult()">Change width of top border</button>
</body>
</html>
Try it yourself »
Style Object
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