Svg добавить path

var drawConnector = function(A, B) {
  var posnALeft = {
    x: A.offsetLeft - 8,
    y: A.offsetTop  + A.offsetHeight / 2
  };
  var posnARight = {
    x: A.offsetLeft + A.offsetWidth + 8,
    y: A.offsetTop  + A.offsetHeight / 2    
  };
  var posnBLeft = {
    x: B.offsetLeft - 8,
    y: B.offsetTop  + A.offsetHeight / 2
  };
  var posnBRight = {
    x: B.offsetLeft + B.offsetWidth + 8,
    y: B.offsetTop  + A.offsetHeight / 2
  };
  var dStr =
      "M" +
      (posnARight.x      ) + "," + (posnARight.y) + " " +
      "C" +
      (posnARight.x + 100) + "," + (posnARight.y) + " " +
      (posnBLeft.x - 100) + "," + (posnBLeft.y) + " " +
      (posnBLeft.x      ) + "," + (posnBLeft.y);
  var id = A.getAttribute('id') + "to" + B.getAttribute('id');
  if (!document.getElementById(id)){
    var path = document.createElement("path");
    path.setAttribute("id", id);
    path.setAttribute("fill","none");
    path.setAttribute("stroke","black");
    path.setAttribute("maker-end","url(#arrowhead)");
    path = document.getElementById("Arrows").appendChild(path);
  }
  document.getElementById(id).setAttribute("d", dStr);
   document.getElementById(id).innerHTML="ww";
};

path = document.createElementNS("http://www.w3.org/2000/svg","path");//В функции создания path