function toggle(level) {
  if ( level.style.display == "none" ) {
    closeALL()
    level.style.display = "block";
  }
  else if ( level.style.display == "block" ) {
    level.style.display = "none";
  }
}
function menuclose(level) {

    level.style.display = "none";
}
function closeALL() {
  menuclose(t1)
  menuclose(t2)
  menuclose(t3)
  menuclose(t4)
  menuclose(t5)
  menuclose(t6)
  menuclose(t7)
  menuclose(t8)
  menuclose(t9)
  menuclose(t10)
  menuclose(t11)
  menuclose(t12)
}