How do I make an input field accept only letters in javaScript?

Question

How do I make an input field accept only letters in javaScript? now i need it to accept only letters?

Answer 1

You can use HTML5:

<form>
    <input type='text' pattern='[A-Za-z\\s]*'/>
</form>

If you only want to do it with javascript:

function alpha(value) {
  var regex = /^[a-zA-Z]*$/;
  if (regex.test(value)) {
      return true;
  }
  else {
      return false;
  }
}