判断输入是否是正确的邮箱格式

isAvailableEmail function isAvailableEmail(sEmail) {//return /^([a-zA-Z0-9_-]+)(\.[a-zA-Z0-9_-]+)*@([a-zA-Z0-9_-]+)(\.[a-zA-Z0-9_-]+)*.([a-zA-Z0-9_-]+)$/i.test(sEmail);return /^(\w+)(\.\w+)*@(\w+)(\.\w+)*.(\w+)$/i.test(sEmail);}