getting the value of checked checkbox to remove from div with DOM

I have a doubt in selecting and verify that the checkbox is checked in a div with id="div1" which in turn is added in another div with id = "box" and the result is checkbox -> div.id = div1 -> divbox.id = box

I have this base function to create checkbox and insert in div1 and add div1 to div box and it´s work and I don´t put the css code because don´t need

function createCheckBox() {
  //count
  var count = 0;

  var div = document.createElement('div');
  div.id = "div1";
  div.style.fontSize = "20px";

  //div box 
  var box = document.getElementById('box');

  //checkbox
  var checkbox = document.createElement('input');
  checkbox.type = "checkbox";
  checkbox.name = "checkBox" + (count++);
  checkbox.id = checkbox.name;

  var label = document.createElement('label')
  label.htmlFor = "id";
  label.appendChild(document.createTextNode("checkBox" + (count++)));
  var br = document.createElement('br');

  div.appendChild(checkbox);
  div.appendChild(label);
  div.appendChild(br);

  box.appendChild(div);
}

my doubt is select checkbox check and return if is checked or not and in this function removeCheckBox I wanna get value of checked checkbox in this way divbox.id = box -> div.id = div1 -> checkbox.checked and it´s not work

function removeCheckBox() {
  //box
  var box = document.getElementById("box");
  //div1
  var div1 = divbox.getElementById("div1");

  for (var i = 0; div1.childNodes.lenght; i++) {
    if (div1.childNodes[i].checked) {
      alert("CheckBox is checked");
      //remove from div1
      div1.removeChild(div1.childNodes[i]);
    } else {
      alert("CheckBox is not checked");
    }
  }
}

any suggestion?