function Lib(ws) {
  return {
    clearElement: clearElement,
    insert: insert,
    send: send
  };

  function clearElement(elem) {
    while(elem.firstChild) {
      elem.removeChild(elem.firstChild);
    }
  }

  function insert(obj, t, min, max) {
    min = min == undefined ? 0 : min;
    max = max == undefined ? t.length : max;
    if(max - min < 1) {
      return min;
    }
    var avg = Math.floor((max + min) / 2);
    return (obj < t[avg]) ? insert(obj, t, min, avg) : insert(obj, t, avg+1, max);
  }

  function send(o) {
    ws.send(JSON.stringify(o));
  }
}