KeyEvent altKey Property - Javascript DOM

Javascript examples for DOM:Key Event

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Description

The altKey property tells if the "ALT" key is pressed.

This property is read-only.

Return Value

A Boolean, telling if the "ALT" key was pressed.

The following code shows how to find out if the "ALT" key was pressed when a keyboard key is pressed:

Demo Code

ResultView the demo in separate window 

<!DOCTYPE html>
<html>
<body>

<input type="text" onkeydown="isKeyPressed(event)">

<p id="demo"></p>

<script>
function isKeyPressed(event) {/*from  w ww.j av  a  2  s . co m*/
    var x = document.getElementById("demo");
    if (event.altKey) {
        x.innerHTML = "The ALT key was pressed!";
    } else {
        x.innerHTML = "The ALT key was NOT pressed!";
    }
}
</script>

</body>
</html>

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