CODEWITHSUNDEEP
javascripthtmlregexvalidation
user1910290
user1910290

Reputation: 537

RegEx which allows only english text and no special charactes

I want to validate a text field (first name) using javascript. such that it should only contain text. NO special characters and No numbers.and since it is just the first name it should only contain one word. (no spaces)

Allowed:

Not Allowed

I tried this but its not working.

if( !validateName($fname)) 
    {
     alert("name invalid");
    }   


function validateName($name) {
var nameReg = /^A-Za-z*/;
if( !nameReg.test( $name ) ) {
    return false;
 } else {
   return true;
  }
}

EDIT: I tried 

var nameReg = /^[A-Za-z]*/;

but it still doesn't show the alert box when I enter john123 or 123john.

Upvotes: 1

Views: 9653

Answers (2)

pete
pete

Reputation: 25081

Use a character class:

var nameReg = /^[A-Za-z]*/;

Without the containing [] (making it a character class), you're specifying a literal A-Za-z.

UPDATE:

Add a $ to the end of the Regex.

var nameReg = /^[A-Za-z]*$/;

Otherwise, john123 returns valid as the Regex is matching john and can ignore the 123 portion of the string.

Working demo: http://jsfiddle.net/GNVck/

Upvotes: 1

Explosion Pills
Explosion Pills

Reputation: 191749

nameReg needs to be /^[a-z]+$/i (or some varient). The ^ matches the start of the string and $ matches the end. This is "one or more a-z characters from the start to the end of the string, case-insensitive." You can change + to *, but then the string could be empty.

http://jsfiddle.net/ExplosionPIlls/pwYV3/1/

Upvotes: 2

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