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Check if Alt key is pressed during the event in JavaScript

Description

The following code shows how to check if Alt key is pressed during the event.

Example


<!--  w  w w .  ja v  a2  s .co m-->
<html>
<head>
<script type="text/javascript">
function handleEvent(oEvent) {
var oTextbox = document.getElementById("txt1");
oTextbox.value += "\n>" + oEvent.type;
oTextbox.value += "\n    target is " + (oEvent.target || oEvent.srcElement).id;
oTextbox.value += "\n    charCode is " + oEvent.charCode;

var arrKeys = [];
if (oEvent.altKey) {
arrKeys.push("Alt");
}
oTextbox.value += "\n    keys down are " + arrKeys;
}
</script>
</head>
<body>
<P>Type some characters into the first textbox.</p>
<P><textarea id="txtInput" rows="15" cols="50"
onkeypress="handleEvent(event)"></textarea></p>
<P><textarea id="txt1" rows="15" cols="50"></textarea></p>
</body>
</html>

Click to view the demo

The code above generates the following result.

Check if Alt key is pressed during the event in JavaScript
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