function validateEmail(email) {
var re = /^(([^<>()[\]\\.,;:\s@\"]+(\.[^<>()[\]\\.,;:\s@\"]+)*)|(\".+\"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;
return re.test(email);
} di web ini juga dikasih url ke live demo untuk nyobain validasi alamat email ini
http://jsbin.com/ozeyag/19
anyway, itu belum lengkap rupanya. setelah gue googling lagi nemu yang lebih lengkap
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title></title>
<script type="text/javascript">
function IsValidEmail(email) {
var expr = /^([\w-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([\w-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$/;
return expr.test(email);
};
function ValidateEmail() {
var email = document.getElementById("txtEmail").value;
if (!IsValidEmail(email)) {
alert("Invalid email address.");
}
else {
alert("Valid email address.");
}
}
</script>
</head>
<body>
<form id="form1">
<input type="text" id="txtEmail" />
<input type="button" id="btnValidate" value="Validate Email" onclick = "ValidateEmail()" />
</form>
</body>
</html>
http://www.aspsnippets.com/Articles/Email-Address-Validation-in-JavaScript-using-Regular-Expressions.aspx
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