# Display error if user type letters in "phone" input field

**URL:** <https://forum.kirupa.com/t/display-error-if-user-type-letters-in-phone-input-field/321122>\
**Category:** flash\
**Created:** [April 11, 2011, 1:51pm UTC](https://forum.kirupa.com/t/display-error-if-user-type-letters-in-phone-input-field/321122 "2011-04-11T13:51:29Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![svimp](https://avatars.discourse-cdn.com/v4/letter/s/4af34b/32.png) [@svimp](https://forum.kirupa.com/u/svimp)\
**Post date:** [April 11, 2011, 1:51pm UTC](https://forum.kirupa.com/t/display-error-if-user-type-letters-in-phone-input-field/321122/1 "2011-04-11T13:51:29Z")

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Same problem but now with the “phone field” how can i display an error if user type letters instead of numbers in the phone field ?