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top property (screen)

Browser support:
Retrieves the vertical offset of the top-left corner of the current screen relative to the top-left corner of the main screen, in pixels.

You can find the related objects in the Supported by objects section below.
This property is read-only.

Possible values:

Integer that retrieves the offset, in pixels.
Default: this property has no default value.

Example HTML code 1:

This example illustrates the use of the top property:
    <script type="text/javascript">
        function GetDimensions () {
            var scrLeft = document.getElementById ("scrLeft");
            scrLeft.innerHTML = screen.left;
            var scrTop = document.getElementById ("scrTop");
            scrTop.innerHTML =;
            var scrWidth = document.getElementById ("scrWidth");
            scrWidth.innerHTML = screen.width;
            var scrHeight = document.getElementById ("scrHeight");
            scrHeight.innerHTML = screen.height;

            var availLeft = document.getElementById ("availLeft");
            availLeft.innerHTML = screen.availLeft;
            var availTop = document.getElementById ("availTop");
            availTop.innerHTML = screen.availTop;
            var availWidth = document.getElementById ("availWidth");
            availWidth.innerHTML = screen.availWidth;
            var availHeight = document.getElementById ("availHeight");
            availHeight.innerHTML = screen.availHeight;
<body onload="GetDimensions ();">
    <h3>Dimensions of the screen:</h3>
    Left: <span id="scrLeft"></span><br />
    Top: <span id="scrTop"></span><br />
    Width: <span id="scrWidth"></span><br />
    Height: <span id="scrHeight"></span><br />

    <h3>Dimensions of the available area:</h3>
    Left: <span id="availLeft"></span><br />
    Top: <span id="availTop"></span><br />
    Width: <span id="availWidth"></span><br />
    Height: <span id="availHeight"></span><br />
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