ProfessinalJavaScriptDemos/Ch13/DOMLevel3LocationGetModifierStateExample01.htm at master · wangminli/ProfessinalJavaScriptDemos · GitHub

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<!DOCTYPE html>
<html>
<head>
    <title>DOM Level 3 getModifierState() Example</title>
    <script type="text/javascript" src="EventUtil.js"></script>
</head>
<body>
    <input type="text" id="myText" />
    <script type="text/javascript">
        var textbox = document.getElementById("myText");
        EventUtil.addHandler(textbox, "keyup", function(event){
            event = EventUtil.getEvent(event);

            if (event.getModifierState){
                alert(event.getModifierState("Shift"));
            }
        });
    </script>
</body>
</html>