Javascript Email Validation
We can validate the email with the help of JavaScript. Here we check the condition related to any email id, like email it must have "@" and "." sign and also email id must be atleast 10 character. There are many criteria that need to be follow to validate the email id such as:
- email id must contain the @ and .(dot) character
- There must be at least one character before and after the @
- There must be at least two character after .(dot).
Example
<!DOCTYPE html>
<html>
<head>
<script>
function email_validation()
{
var x=document.myform.email.value;
var atposition=x.indexOf("@");
var dotposition=x.lastIndexOf(".");
if (atposition<1 || dotposition<atposition+2 || dotposition+2>=x.length){
alert("Please enter a valid e-mail address
atpostion:"+atposition+"
dotposition:"+dotposition);
return false;
}
}
</script>
</head>
<body>
<form name="myform" method="post" action="#" onsubmit="return email_validation();">
Email: <input type="text" name="email"><br/>
<input type="submit" value="Register">
</form></body>
</html>