# Ensuring certain characters are inputted

**URL:** <https://forum.kirupa.com/t/ensuring-certain-characters-are-inputted/41652>\
**Category:** flash\
**Created:** [January 31, 2004, 5:42pm UTC](https://forum.kirupa.com/t/ensuring-certain-characters-are-inputted/41652 "2004-01-31T17:42:21Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![RageW0lf](https://avatars.discourse-cdn.com/v4/letter/r/e495f1/32.png) [@RageW0lf](https://forum.kirupa.com/u/RageW0lf)\
**Post date:** [January 31, 2004, 5:42pm UTC](https://forum.kirupa.com/t/ensuring-certain-characters-are-inputted/41652/1 "2004-01-31T17:42:21Z")

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Hi, this is should be pretty basic.

I have an input field for an email address and I want to sure the input contains an “@” symbol. I am sure I have done this in the past but can’t remember the code exactly.

I have tried to stick a NOT (!) in there but can’t seem to get the code right.

Can anybody remind me how to do this?