# Allow Only Numbers in the Input Field **URL:** \ **Category:** web dev\ **Created:** [August 17, 2009, 5:40am UTC](https://forum.kirupa.com/t/allow-only-numbers-in-the-input-field/294581 "2009-08-17T05:40:05Z")\ **Posts on this page:** 1\ **Page:** 1

**Author:** ![audiohominis](https://avatars.discourse-cdn.com/v4/letter/a/c68b51/32.png) [@audiohominis](https://forum.kirupa.com/u/audiohominis)\ **Post date:** [August 17, 2009, 5:40am UTC](https://forum.kirupa.com/t/allow-only-numbers-in-the-input-field/294581/1 "2009-08-17T05:40:05Z")

Hi folx. I’m looking to restrict a field to numeric input. The following neat [example from w3schools](http://www.w3schools.com/jsref/tryit.asp?filename=tryjsref_onkeydown) shows how to achieve the exact opposite of that - blocking _only_ numbers. ```auto ``` I found that removing the exclamation mark (!) on line #19: ([FONT=“Courier New”]return [COLOR=“Red”]![/COLOR]numcheck.test(keychar);[/FONT]) switches it to allowing only numbers. However, as a consequence, such keys as **Shift** , **Ctrl** , **Home** , **End** , **Insert** , **Delete** , **Backspace** , etc are also blocked, so some of the useful functionalities, e.g. user’s ability to Shift-select are disabled. **Question:** How do I modify this code so the input field would accept only numbers without compromising those basic text editing functionalities or the concise elegance of the code. Thank you much. PS. I never explored JavaScript before.