function make_longer(id)
{
  var def_field_width = 143;
  var field_width = document.getElementById(id).style.width;
  var field_width_len = field_width.length - 2;
  var field_width_px = field_width.substr(0, field_width_len);

  var str_width = document.getElementById(id).value;
  var span_obj = document.getElementById("w_d");
  span_obj.style.visibility = "hidden";
  span_obj.innerHTML = str_width;
  var str_width_px = span_obj.offsetWidth;

  if(str_width_px > def_field_width && str_width_px < 340)
  {
    field_width_px = str_width_px + "px";
    document.getElementById(id).style.width = field_width_px;
  }
}

function start(id)
{
  //setInterval("make_longer(id)", 1);
  make_longer(id);
}