function l1lightClass () {
  var blackweb = "";
  var body = "";
  this._off = l_off;
  this._on = l_on;

function l_on() {
  this.blackweb.style.display = "none";
}

function l_off() {
  this.blackweb.style.display = "block";
  this.blackweb.style.height = parseInt(document.documentElement.scrollHeight) + "px";
}

}