function addLine() {
  var ni = document.getElementById('myDiv');
  var numi = document.getElementById('theValue');
  var num = (document.getElementById("theValue").value -1)+ 2;
  numi.value = num;
  var divIdName = "my"+num+"Div";
  var newdiv = document.createElement('div');
  var jojo = num;
  newdiv.setAttribute("id",divIdName);
  if (jojo <= 4) 
{
 newdiv.innerHTML = "<label>E-mail Address " + num + ": </label><input type=\"text\" name=\"email[]\" value=\"\" />";
  ni.appendChild(newdiv);
}
 
}

function removeElement(divNum) {
  var d = document.getElementById('myDiv');
  var olddiv = document.getElementById(divNum);
  d.removeChild(olddiv);
}