The only true way of validating an email is to send an email and ask for a reply of some kind. This function is an initial step by making sure the format is correct.
function isEmail(e)
{
var emailPattern = new RegExp(/^\s*[\w\-\+_]+(\.[\w\-\+_]+)*\@[\w\-\+_]+\.[\w\-\+_]+(\.[\w\-\+_]+)*\s*$/);
return(emailPattern.test(e));
}
{
var emailPattern = new RegExp(/^\s*[\w\-\+_]+(\.[\w\-\+_]+)*\@[\w\-\+_]+\.[\w\-\+_]+(\.[\w\-\+_]+)*\s*$/);
return(emailPattern.test(e));
}
And an example html page.
<html>
<head>
<script>
function testEmail(e)
{
if(isEmail(e))
alert('true');
else
alert('false');
}
function isEmail(e)
{
var emailPattern = new RegExp(/^\s*[\w\-\+_]+(\.[\w\-\+_]+)*\@[\w\-\+_]+\.[\w\-\+_]+(\.[\w\-\+_]+)*\s*$/);
return(emailPattern.test(e));
}
</script>
</head>
<body>
<h1>Email RegExp Test</h1>
<input id="email" type="text"/>
<input type="button" value="Test" onclick="testEmail(document.getElementById('email').value);"/>
</body>
</html>
<head>
<script>
function testEmail(e)
{
if(isEmail(e))
alert('true');
else
alert('false');
}
function isEmail(e)
{
var emailPattern = new RegExp(/^\s*[\w\-\+_]+(\.[\w\-\+_]+)*\@[\w\-\+_]+\.[\w\-\+_]+(\.[\w\-\+_]+)*\s*$/);
return(emailPattern.test(e));
}
</script>
</head>
<body>
<h1>Email RegExp Test</h1>
<input id="email" type="text"/>
<input type="button" value="Test" onclick="testEmail(document.getElementById('email').value);"/>
</body>
</html>
Validated.
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