知识点主要就是那串正则~

$(function(){
    $("#save").on("click",function(){
        var email=$("#email").val();
        var e=/^([a-zA-Z0-9]+[_|\-|\.]?)*[a-zA-Z0-9]+@([a-zA-Z0-9]+[_|\-|\.]?)*[a-zA-Z0-9]+\.[a-zA-Z]{2,3}$/;
        if(email.match(e)){
            $.ajax({
                'url':"/user/saveEmail",
                'data':{
                        'email':email
                        },
                'type':'post',
                'success':function(data){
                        if(data == '1'){
                            alert("保存成功");
                            location.reload();
                        }else if(data == '2'){
                            alert('该邮箱已注册');
                        }else if(data == '3'){
                            alert("保存失败");
                            location.reload();
                        }
                    }
            });
        }else{
            alert("不满足邮箱格式");
        }
    });
});

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