function isValidEmail(strEmail){
	 var emailReg = /^([a-zA-Z0-9_\-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([a-zA-Z0-9\-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$/
     var regex = new RegExp(emailReg);
     return regex.test(strEmail);
}