JavaScript Program to Check Whether Entered Email is Valid or not Using Regular Expression
Write a JavaScript program to check whether entered email is valid or not using Regular Expression.
Source Code
<html>
<head>
<title>Check Email ID</title>
<script>
function checkEmail()
{
var email = document.getElementById('email').value
var regex = /^([a-zA-Z0-9_\.]+)@([a-zA-Z0-9_\.]+)\.([a-zA-Z]{2,5})$/
var res = regex.test(email)
if(!res)
{
alert('Please enter valid email id')
}
else
{
alert('Thank you')
}
}
</script>
</head>
<body>
<form name="myform" action="#" method="post">
Enter Email ID <input type="text" id="email" /><br/>
<input type="button" value="Submit" onclick="checkEmail()"/>
</form>
</body>
</html>
Output
