/^(([^<>()[].,;:s@"]+(.[^<>()[].,;:s@"]+)*)|(".+"))@(([^<>()[].,;:s@"]+.)+[^<>()[].,;:s@"]{2,})$/i
歪果仁写的比国内的好使
https://stackoverflow.com/questions/46155/how-to-validate-an-email-address-in-javascript