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<html>
<head>
<title>A valid e-mail address</title>
<script type="text/javascript">
var validEmail = "a@t.com";
var invalidEmail = "d@t";
var pattern = /^[\w\.\-]+@([\w\-]+\.)+[a-zA-Z]+$/;
var a = pattern.test(validEmail);
var b = pattern.test(invalidEmail);
document.write(validEmail + " is valid: " + a + ", " +invalidEmail + " is valid: " + b);
</script>
</head>
<body>
</body>
</html>
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