Javascript for validating email with regular expression

: Finally, the email address must end with two to four alphabets.

Having a-z and A-Z means that both lowercase and uppercase letters are allowed.

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You can use them to constrain input, apply formatting rules, and check lengths. This How To shows how you can use regular expressions within ASP. Objectives Overview Using a Regular Expression Validator Control Using the Regex Class Common Regular Expressions Additional Resources If you make unfounded assumptions about the type, length, format, or range of input, your application is unlikely to be robust.

To validate input captured with server controls, you can use the Regular Expression Validator control. Input validation can become a security issue if an attacker discovers that you have made unfounded assumptions.

Validation codes will return an alert message, if it finds some empty fields in the form.

If an user miss out any field, than the form will display error message.

We can validate email address at client side and server side.

To validate email address on client side, we can use java script with regular expression.

Last month I wrote about regular expressions in Java, today I’ll show you how to use regular expression in Java Script to validate email address.

Here is the code to validate email address in Java Script using regular expression.

Data validation is an essential aspect of any Web application that accepts data from the user.

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