function setadult(room){
 start=parseInt(room);
 limited=start*4;
addselect=document.getElementById('adult');
while (addselect.length> 0) {
   addselect.remove(0);
} 
 for(i=start;i<=limited;i++){
  var elOptNew = document.createElement('option');
    elOptNew.text = i;
    elOptNew.value = i;
addselect .appendChild(elOptNew) ;
 }
 }

  function setadult2(room){
 start=parseInt(room);
 limited=start*4;
addselect=document.getElementById('adult2');
while (addselect.length> 0) {
   addselect.remove(0);
} 
 for(i=start;i<=limited;i++){
  var elOptNew = document.createElement('option');
    elOptNew.text = i;
    elOptNew.value = i;
addselect .appendChild(elOptNew) ;
 }
 }