ProfessinalJavaScriptDemos/Ch13/HTMLEventHandlerExample04.htm at master · wangminli/ProfessinalJavaScriptDemos · GitHub

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<!doctype html>
<!DOCTYPE html>
<html>
<head>
    <title>HTML Event Handler Example</title>
</head>
<body>
<form method="post">
    <input type="text" name="username" value="enter username">
    <input type="button" value="Echo Username" onclick="alert(username.value)">
</form>

</body>
</html>