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If the string value is numeric, it will return true, otherwise it will return false.

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.

In the above form, we are calling validate() to validate data when onsubmit event is occurring.

The following code shows the implementation of this validate() function.

escaping - by -) [0-9] : It matches digital number from 0-9. That means, you could be very sure about the form, whether users have entered the details or not.

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

The expression for matching numbers and characters in the field is: /^[0-9a-z A-Z] $/ It’s must to provide validation in the select field.

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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. If an user miss out any field, than the form will display error message. Checking for form completion: The first step of form validation is to check, whether the user have entered information in all the fields or not.Here I am giving you the form validation codes in Java Script. These are simple meta characters which do pattern matching. If the entered characters in the field is not in lower case or upper case. When it’s about checking contact field or zip code field, one need to check whether only the number have been entered or not.Regular expression helps you in pattern matching in string. : Matches any single charcter except a new line : Matches the preceding character or repeated character. The basic expression for matching entered value as number in the field is: /^[0-9] $/.

Validating email address format in javascript