// JavaScript Document

function isValidEmail (smail) {
	var eml = /^[\w-]+(\.[\w-]+)*@[a-zA-Z0-9-]+(\.[a-zA-Z0-9]+)*(\.([a-zA-Z]){2,4})$/;
	
	if ( smail.match(eml) )
		return true;
	else
		return false;
}