/* checks age */

function is21 (f) {
 var theirDate = new Date( f.month.value + "/" + f.day.value + "/" + f.year.value);

 // check for validity of date
 if (theirDate=="Invalid Date" || theirDate=="NaN") {
   alert ("Date must be in numeric MM, DD, YYYY format.");
   return false;
 }

  // alert ("entry date: " + theirDate);
 var now = new Date();
 var validDate = new Date();
 validDate.setFullYear(now.getFullYear() - 21, now.getMonth(), now.getDay());
  // alert ("now: " + now);

 if ( validDate.getTime() < theirDate.getTime()) {
 	//alert("Sorry, you must be 21 years of age to enter this sweepstakes.");
 	document.cookie = "youngster=true; max-age="+(60*60*24*14);
 	this.reload();
 } else {
 	// alert ("return true");
 	f.isValid.value = "true";
 	return true;
 }
}