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altKey Event Attribute
 Complete Event Object Reference
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
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event.altKey=true|false|1|0
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Example
The following example alerts whether or not the "ALT" key was pressed when a
mouse button is clicked:
<html>
<head>
<script type="text/javascript">
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>
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Complete Event Object Reference
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