function checkLamps() {
  try {
    var minWidth = 940;
    var width = document.body.clientWidth + document.body.scrollLeft;

    if (width <= minWidth) {
      document.getElementById("div_lamps").style.display = "none";
    } else {
      document.getElementById("div_lamps").style.display = "block";
    }
  } catch(e) {
  }

}