Thanks Bruce,Someone else gave me the following and it works just fine:if (event.value) { event.rc = /^\d{5,7}$/.test(event.value); if (!event.rc) app.alert("You must enter between 5 and 7 digits.");}Do you know where I can read up on: /^\d{5,7}$/.test(event.value)Regards,JeffJeff HillLions Clubs InternationalMSC Business Analyst630-468-6759Celebrating 100 Years of ServiceLions100.org“We Serve”[ico-fb][ico-yt]

So If I wanted 4 digits and retain leading zeros in the display I would use num{'000'9}?Where does that go on the Validate tab in the custom validation script?