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altKey Event Attribute

Event Object Reference Event Object

Definition and Usage

The altKey event attribute returns a Boolean value that indicates whether or not the "ALT" key was pressed when an event was triggered.

Syntax

event.altKey=true|false|1|0


Example

Example

The following example alerts whether or not the "ALT" key was pressed when a mouse button is clicked:

<html>
<head>
<script>
function isKeyPressed(event)
{
if (event.altKey==1)
  {
  alert("The ALT key was pressed!")
  }
else
  {
  alert("The ALT key was NOT pressed!")
  }
}
</script>
</head>

<body onmousedown="isKeyPressed(event)">

<p>Click somewhere in the document.
An alert box will tell you if you
pressed the ALT key or not.</p>

</body>
</html>

Try it yourself »


Event Object Reference Event Object

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