var showed = 0;
function showChanger() {
  var cur = document.getElementById("cursite");
  var lt = document.getElementById("linktext");
  var ls = document.getElementById("linkset");
  if (showed == 0) {
  showed = 1;
  cur.className = "cursite2";
  lt.innerHTML = "Убрать список";
  ls.style.display = "block";
  } else {
    hideChanger();
  }
}

function hideChanger(){
  if (showed == 1) {
    var cur = document.getElementById("cursite");
    var lt = document.getElementById("linktext");
  var ls = document.getElementById("linkset");
    cur.className = "cursite1";
    lt.innerHTML = "Другой регион";
    showed = 0;
    ls.style.display = "none";
  }
}