how to validate not only numbers but letters as well [#2313887]

I need to validate that a field does not contain only numbers. in other words it can have some numbers but must have some letters as well. Can someone help me with the regex to do that? thanks

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Comment #1

dianacastillo CreditAttribution: dianacastillo commented 1 August 2014 at 17:42

Someone gave me the answer on drupal stackexhange so I thought I would share it:
2 down vote accept

Here are the steps you'll need to follow:

Go to your webform
Select the "form validation" button.
under the "Add a validation rule" select "Regular expression, case-sensitive"
For the regex, you can use ^\d*$ and check the negate rule box below

Go to your webform
Select the "form validation" button.
under the "Add a validation rule" select "Regular expression, case-sensitive"
For the regex, you can use [^\d]+