We can validate the email by the help of JavaScript.
There are many criteria that need to be follow to validate the email id such as:
- email id must contain the @ and . character
- There must be at least one character before and after the @.
- There must be at least two characters after . (dot).
Let's see the simple example to validate the email field.
- <script>
- function validateemail()
- {
- 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 \n atpostion:"+atposition+"\n dotposition:"+dotposition);
- return false;
- }
- }
- </script>
- <body>
- <form name="myform" method="post" action="#" onsubmit="return validateemail();">
- Email: <input type="text" name="email"><br/>
-
- <input type="submit" value="register">
- </form>
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