function dateVal(f) {
  ar=f.date.value.split("-");
  searchDate=new Date(ar[0],ar[1]-1,ar[2]);
  ar[1]=(searchDate.getMonth()+1)<10?"0"+(searchDate.getMonth()+1):(searchDate.getMonth()+1);
  ar[2]=(searchDate.getDate())<10?"0"+(searchDate.getDate()):(searchDate.getDate());
  ar[0]=searchDate.getFullYear();
  if(f.date.value!=ar[0]+"-"+ar[1]+"-"+ar[2]) {
    alert("Sorry, "+f.date.value+" is not a valid date.\n\nPlease make sure you have entered a valid date in yyyy-mm-dd format and try again.");
    return false;
  } else {
    return true;
  }
}