How do I make var prompt ONLY accept letters

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Hi, I am making a simple website. For the first variable prompt, under the 'delivery' function, I would like the user to input a name. I've already set it up, so they cannot only enter numbers, but when the user enters a combination of number and letters, it still accepts it, and continues with the program.

I would like to to only accept letters.

How can I do this?

Thanks!

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Posted 11-Jun-15 17:11pm

Garlotch

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DamithSL · Accepted Answer · 2015-06-11T17:43:00

Solution 1

use regex to validate, for example :

JavaScript

var letters = /^[a-zA-Z]+$/;
if(inputString.match(letters))
{
    alert('input contains letters only');
}else
{
    alert('invalid input');
}

Posted 11-Jun-15 17:43pm

DamithSL

Sergey Alexandrovich Kryukov · Accepted Answer · 2015-06-11T17:47:00

Solution 2

You can filter out input. Please see this article with code samples: http://www.javascripter.net/faq/keyboardinputfiltering.htm[^].

—SA

Posted 11-Jun-15 17:47pm

Sergey Alexandrovich Kryukov