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borderTopWidth style property

Browser support:
Specifies or returns the width of the element's top border.


You can find the related objects in the Supported by objects section below.
This property is read/write.
CSS page for this property: border-top-width

Possible values:

The type of this property is string.
 One of the following values: 
border width in non-negative length
The width of the border in length units. For the supported length units, see the length page.
Takes the value of this property from the computed style of the parent element.
Greater than the medium width.
Less than the medium width.
Default: medium.

Example HTML code 1:

This example illustrates the use of the border-top-width property:
        .example {
            border-top-color: blue;
            border-top-width: 5px;
            border-top-style: solid;
    <div class="example">Border-top-width: 5px</div>
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Example HTML code 2:

This example illustrates the use of the borderTopWidth property in JavaScript:
    <script type="text/javascript">
        function ChangeBorder (selectTag) {
            // Returns the index of the selected option
            var whichSelected = selectTag.selectedIndex;

            // Returns the text of the selected option
            var selectState = selectTag.options[whichSelected].text;

            var div = document.getElementById ("myDiv");
   = selectState;
    <div id="myDiv" style="border-top: 1px solid blue">Sample division with border-top</div>

    <select onchange="ChangeBorder (this);" size="5">
        <option selected="selected" />1px
        <option />3px
        <option />8px
        <option />15px
        <option />24px
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Supported by objects:

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