使用setInterval请求ajax

Question

I want to call ajax function at specified intervals after enterkey being pressed. However, the code doesn't work. I want to get some advice. Thank you!

    function regist(){
    $.ajax({
      url: '/getlabel',
      method: 'GET'
    }).done(function(r){
      // console.log(r);
      $('#label').text(r)
      console.log("ajax-success")
    }).fail(function(){
      console.log("ajax fail")
    });
}

function keyPress(e) {
    if (e.keyCode == 13) {
        setInterval( regist() , 3000);
        return false;
    }
}