var show = 1;
function change(id) {
  var a = 1;
  while (a < 5){
    document.getElementById('c' + a).style.display='none';
    document.getElementById('m' + a).setAttribute('class', 'menu_edit');
    a++;
  }
  document.getElementById('m' + id).setAttribute('class', 'menu_edit_active');
  document.getElementById('c' + id).style.display='block';
}