Edit in JSFiddle

<form id="myfrm">
  이름: <input type="text" name="name" value="남기용"><br>
  이메일 : <input type="email" name="email" value="[email protected]"><br><br>
  <input type="submit" value="전송">
</form>
<hr>
<button onclick="myFunction()">form 요소값 가져오기</button>
<div id="demo"></div>

function myFunction() {
  var myfrm = document.forms["myfrm"];
  var text = "";
  var i, len = myfrm.length;
  for (i = 0; i < len; i++) {
    text += myfrm.elements[i].value + "<br>";
  }
  document.getElementById("demo").innerHTML = text;
}