Javascript validating forms php

By combining the expression for numbers and alphabetic characters, there is an expression that checks, whether the entered things includes numbers and alphabetic character or not.

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An email address must contain at least a ‘@’ sign and a dot (.).

Also, the ‘@’ must not be the first character of the email address, and the last dot must at least be one character after the ‘@’ sign.

So, just to make sure that user entered the email address in the correct format, it’s necessary to include email validation code inside the validation codes.

A general expression to check valid email address is: /^[w-.

It happens sometimes, when user forgets to choose option from the select feild.

In that case, the form should convey about issue so that user can take the action.

function length Define(inputtext, min, max) // Function that checks whether a option is selected from the selector and if it's not it displays an alert message.

function true Selection(inputtext, alert Msg) // Function that checks whether an user entered valid email address or not and displays alert message on wrong email address format.

Form validation normally used to occur at the server, after the client had entered all the necessary data and then pressed the Submit button.

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