function cambio(x)
{
   var y=document.getElementById(x).value;
   var label1 = document.getElementById("ctl00_ContentPlaceHolder1_lblArrivalPoint");
   var label2 = document.getElementById("ctl00_ContentPlaceHolder1_lblArrivalTime");
   
   
   if (y==11) {            
      label1.innerHTML = 'Airline & Flight Number:';
      label2.innerHTML = 'Arrival Time:';
   }
   else
   {
     label1.innerHTML = 'Hotel / Meeting Point:';
     label2.innerHTML = 'Pick up time:';
   }
}