ajax를 통한 아이 유효성 검사

document.getElementById("email").addEventListener("blur",function(e){

email = document.getElementById("email").value;

if(email.length>0){

$.ajax({

url:"emailcheck.me",

dataType:"json",

data:{"email":email},

success:function(data){

     

if(data.result==false){

document.getElementsByClassName("form-group")[0].className="form-group has-success"

}else{

document.getElementsByClassName("form-group")[0].className="form-group has-warning"

}

}

})

}

});