JQuery : Simple Regular expression for Email validation

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Email validation is always required when we have a form or login / sign up pages. If we are using JQuery, the below regular expression will be simple and easy to use for validating an email address.
Testemail = /^[a-zA-Z0-9._-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,4}$/i;

 So we can write this in a function :
function TestValidEmail(sEmail) { var Testemail = /^[a-zA-Z0-9._-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,4}$/i; if (Testemail .test(sEmail)) { return true; } else { return false; } }

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