JAVASCRIPT 특정 부분 인쇄하기

function info_print() {
  var initBody = document.body.innerHTML;
  window.onbeforeprint = function () {
	document.body.innerHTML = document.getElementById("test").innerHTML;
  }
  window.onafterprint = function () {
    document.body.innerHTML = initBody;
  }
  window.print();
}