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MozBorderStartWidth style property

Browser support:
Specifies or retrieves the width of the element's border start. Use the borderRightWidth property instead.
Equivalent to the borderRightWidth property, for a cross-browser solution use borderRightWidth instead.


You can find the related objects in the Supported by objects section below.
This property is read/write.
CSS page for this property: -moz-border-start-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 -moz-border-start-width property:
        .example {
            border-top: 2px solid green;
            -moz-border-start-color: blue;
            -moz-border-start-width: 5px;
            -moz-border-start-style: solid;
    <div class="example">-moz-border-start-width: 5px</div>
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Example HTML code 2:

This example illustrates the use of the MozBorderStartWidth 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");

            if ('MozBorderStartWidth' in {
       = selectState;
            } else {
                alert ("Your browser doesn't support this example!");
    <div id="myDiv" style="border-left: 1px solid blue; -moz-border-start: 4px solid red;">
        Sample division with -moz-border-start

    <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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