function showTabs1(n) {
  var tabsNumber = 6;
  for (i = 0; i < tabsNumber; i++) {
      if (i == n) {
          document.getElementById("select" + i).className = "tabche";
          document.getElementById("Nselect" + i).style.display = "block";
      } else {
          document.getElementById("select" + i).className = "tabunche";
          document.getElementById("Nselect" + i).style.display = "none";
      }
  }
}

function showTabs2(n){
  var tabsNumber = 4;
  for (i = 0; i < tabsNumber; i++) {
      if (i == n) {
          document.getElementById("selecta" + i).className = "tabche";
          document.getElementById("Zselect" + i).style.display = "block";
      } else {
          document.getElementById("selecta" + i).className = "tabunche";
          document.getElementById("Zselect" + i).style.display = "none";
      }
  }
}

function showTabs3(n){
  var tabsNumber = 3;
  for (i = 0; i < tabsNumber; i++) {
      if (i == n) {
          document.getElementById("selectb" + i).className = "tabche";
          document.getElementById("Xselect" + i).style.display = "block";
      } else {
          document.getElementById("selectb" + i).className = "tabunche";
          document.getElementById("Xselect" + i).style.display = "none";
      }
  }
}