<!--
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 thisDay = 5;
    //var thisMonth = 1;
    //var thisYear = 2007;

    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.full_registration;
 var dob,theMonth,theDay;
 var regNoNum = /\D/;

 var regZipCode = /(^\d{5}$)|(^\d{5}-\d{4}$)/;

 //if (!f.answer[1].checked) { alert('Please choose correct answer.'); return; }
 if (!f.email.value.match(/^\S+@\S+\.\S+$/)) {
   alert('Please enter a valid e-mail address.');
   f.email.select();
   f.email.focus();
   return;
   }


if (f.first.value == "") { alert('Please enter your first name.'); f.first.focus(); return; }

if (f.last.value == "") { alert('Please enter your last name.'); f.last.focus(); return; }

if (f.address1.value == "") { alert('Please enter your mailing address.'); f.address1.focus(); return; }

if (f.city.value == "") { alert('Please enter your city.'); f.city.focus(); return; }

if (f.state.value == "") { alert('Please enter your state.'); f.state.focus(); return; }

if (f.zip.value == "") { alert('Please enter a valid zip code.'); f.zip.focus(); return; }

if (f.zip.value.length < 5) {
         alert('Please enter at least 5 digits for your zip code.');
         f.zip.focus();
         return;
}


if (f.zip.value.match(regNoNum)) {
        alert('Please enter only numbers for your zip code.');
        f.zip.focus();
        return;
}


if (f.phone.value.match(regNoNum)) {
        alert('Please enter only numbers for your phone.');
        f.phone.focus();
        return;
}

 if (f.phone.value.length < 10) {
         alert('Please be sure you enter both your area code and phone number.');
         f.phone.focus();
         return;
 }

 if (eval(f.dob_month.value) == 0) { alert('Please enter a valid month of birth.'); f.dob_month.focus(); return; }
 if (eval(f.dob_day.value) == 0) { alert('Please enter a valid day of birth.'); f.dob_day.focus(); return; }
 if (eval(f.dob_year.value) == 0) { alert('Please enter a valid year of birth.'); f.dob_year.focus(); return; }
 if (!f.gender[0].checked && !f.gender[1].checked) { alert('Please select your gender.'); return; }

 var age = howOld(f.dob_day.value, f.dob_month.value, f.dob_year.value);

 if(age >= 13 && ReadCookie("register") != "no") {
    dob = f.dob_year.value + "-" + f.dob_month.value + "-" + f.dob_day.value;
    f.dob_full.value = dob;
 } else {
     WriteCookie('register','no');
     window.location='sweeps.sorryunder.php';
     return;
 }

f.submit();
}
// -->