<!--
function ReadCookie (CookieName)
{
	var CookieString = document.cookie;
	var CookieSet = CookieString.split (';');
	var SetSize = CookieSet.length;
	var CookiePieces
	var ReturnValue = "";
	var x = 0;
	
	for (x = 0; ((x < SetSize) && (ReturnValue == "")); x++)
	{
		CookiePieces = CookieSet[x].split ('=');

		if (CookiePieces[0].substring (0,1) == ' ')
		{
			CookiePieces[0] = CookiePieces[0].substring (1, CookiePieces[0].length);
		}
		
		if (CookiePieces[0] == CookieName)
		{
			ReturnValue = CookiePieces[1];
		}
	}
	
	return ReturnValue;
}


function WriteCookie (cookieName, cookieValue, expiry)
{
	var expDate = new Date();

	if(expiry)
	{
		expDate.setTime (expDate.getTime() + expiry);
		document.cookie = cookieName + "=" + escape (cookieValue) + "; expires=" + expDate.toGMTString();
	}
	else
	{
		document.cookie = cookieName + "=" + escape (cookieValue);
	}
}

<!--
function fixDate(date) {
  var base = new Date(0);
  var skew = base.getTime();
  if (skew > 0) { date.setTime(date.getTime() - skew); }
}

// determine age
function howOld(day,month,year) {
    var c = new Date(); // a new instance
    fixDate(c);

    var thisDay = c.getDate();
    var thisMonth = c.getMonth() + 1;
    var thisYear = c.getFullYear();

    var yearsold = thisYear - year; 
    var monthsold = 0;
    var daysold = 0;
    var age = '';

    if (thisMonth >= month) {
    	monthsold = thisMonth - month;
    }
    else {
    	yearsold--;
    	monthsold = thisMonth + 12 - month;
    }

    if (thisDay >= day) {
     daysold = thisDay - day;
    }
    else {
        if (monthsold > 0) {
        	monthsold--;
        }
        else {
        	yearsold--;
        	monthsold += 11;
        }
        daysold = thisDay + 31 - day;
    }

    if (yearsold < 0) return '';

    if ((yearsold == 0) && (monthsold == 0) && (daysold == 0)) return '';

    if (yearsold > 0) {
        age = yearsold;
        if (yearsold > 1) age;
        age += ' ';
    }

    return age;
}


function doSubmit() {
 var f = document.email_registration;
 var dob,theMonth,theDay;

 if (!f.email.value.match(/^\S+@\S+\.\S+$/)) {
   alert('Please enter a valid e-mail address.');
   f.email.select();
   f.email.focus();
   return;
   }
 
 /* Validate month: check for digits, then check:  1 <= month <= 12 */
 if(f.dob_month.value.match(/\d{1,2}/)) {
   theMonth = eval(f.dob_month.value);		
   if(!(theMonth <= 12 && theMonth >= 1)){
     alert('Please enter a valid month of birth.');
     f.dob_month.focus();
     //f.dob_month.select(); 
     return; 
  }
 } 
 else {
  alert('Please enter a valid month of birth.');
  f.dob_month.focus();
  //f.dob_month.select(); 
  return; 
 }
  
 /* Validate day: check for digits, then check:  1 <= day <= 31 */
 if(f.dob_day.value.match(/\d{1,2}/)) {
   theDay = eval(f.dob_day.value);
   if(!(theDay >= 1 && theDay <= 31)) {
      alert('Please enter a valid day of birth.'); 
      f.dob_day.focus(); 
      //f.dob_day.select(); 
      return; 
   }
 }
 else {
   alert('Please enter a valid day of birth.'); 
   f.dob_day.focus(); 
   //f.dob_day.select(); 
   return; 
 }

 if(!f.dob_year.value.match(/\d{4}/) || f.dob_year.value=="0000") { 
    alert('Please enter a valid year of birth (xxxx).'); 
    f.dob_year.focus(); 
    //f.dob_year.select(); 
    return; 
 }
 
 if (!f.gender[0].checked && !f.gender[1].checked) { alert('Please select your gender.'); return; }
 
 if (!f.zip.value.match(/^\d{5}$/)) { alert('Please enter a zip code.'); return;}
 
 var age = howOld(f.dob_day.value, f.dob_month.value, f.dob_year.value);
 var expdate = new Date ();
 expdate.setTime(expdate.getTime() +  (100 * 24 * 60 * 60 * 1000)); // a million years from now
 
 
 if(age >= 13 && ReadCookie("sorry") != "no") {
    dob = f.dob_year.value + "-" + f.dob_month.value + "-" + f.dob_day.value;
    f.dob_full.value = dob;
 }
 else { 	
	window.location='sorry.html';
    return;
 }
f.submit();
}
// -->