function populate2(o) {
  d=document.getElementById('sl2');
  if(!d){return;}                 
  var mitems=new Array();
  mitems['Choose']=[''];
  mitems['Auckland']=[' ','BMW','Porsche','Audi','Mini','Mazda'];
  mitems['Wellington']=[' ','BMW','Porsche','Audi','Mini','Mazda'];
  mitems['Christchurch']=[' ','BMW','Porsche','Audi','Mini','Mazda'];
  mitems['Queenstown']=[' ','BMW','Porsche','Audi','Mini','Mazda'];
 
  d.options.length=0;
  cur=mitems[o.options[o.selectedIndex].value];
  if(!cur){return;}
  d.options.length=cur.length;
  for(var i=0;i<cur.length;i++) {
    d.options[i].text=cur[i];
    d.options[i].value=cur[i];
  }
}