Program:
<html>
<head>
<script>
//the input data must contain an @ sign and at least one dot (.).
// Also, the @ must not be the first character of the email address,
//and the last dot must be present after the @ sign, and minimum 2 characters before the end:
function validateForm() {
var x = document.forms["myForm"]["email"].value;
var atpos = x.indexOf("@");
var dotpos = x.lastIndexOf(".");
if (atpos<1 || dotpos<atpos+2 || dotpos+2>=x.length) {
alert("Not a valid e-mail address");
return false;
}
else {
alert(" a valid e-mail address");
return True;
}
}
</script>
</head>
<body>
<h1>Email-id validation:</h1>
<form name="myForm" onsubmit="return validateForm();" method="post">
Email: <input type="text" name="email">
<input type="submit" value="Submit">
</form>
</body>
</html>
Output:
Email-id validation:
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