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altKey Event Attribute
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>
<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
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