email field validation in js code example

Example 1: email validation in javascript

/* JavaScript: validating email address */

isValidEmail("[email protected]"); // true

function isValidEmail(email) {
	var emailRegex = /^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/;
	return !!email && typeof email === 'string'
		&& email.match(emailformat)};
};

Example 2: validate email input javascript onchange

<input input type="text" name="txtEmailId" id="txtEmailId" /> 
   <input type="submit" class="button" value="Suscribe" name="Suscribe" 
            onclick="javascript:ShowAlert()" />