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,chkDay,chkMonth,chkYear) {
	var chkDay = (chkDay == null) ? '' : chkDay;
	var chkMonth = (chkMonth == null) ? '' : chkMonth;
	var chkYear = (chkYear == null) ? '' : chkYear;

	var c = new Date(); // a new instance
	fixDate(c);

	if(chkDay != '' && chkMonth != '' && chkYear != ''){
		var thisDay = chkDay - 1;
		var thisMonth = chkMonth;
		var thisYear = chkYear;
	}
	else{
		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.full_registration;
 var dob,theMonth,theDay;
 var regNum = /\D/;

 var regZipCode = /(^\d{5}$)/;
 
if (f.fullname.value == "") { alert('Please enter contact name'); f.fullname.focus(); return false; }
if (f.phone_d.value.match(regNum)) {
           alert('Please enter only numbers for day time phone.');
           f.phone_d.focus();
           return false;
}
if (f.phone_d.value.length < 10) {
            alert('Please be sure you enter both area code and day time phone number.');
            f.phone_d.focus();
            return false;
}
if (f.phone_n.value.match(regNum)) {
           alert('Please enter only numbers for night time phone.');
           f.phone_n.focus();
           return false;
}
if (f.phone_n.value.length < 10) {
            alert('Please be sure you enter both area code and night time phone number.');
            f.phone_n.focus();
            return false;
}
if (f.address1.value == "") { alert('Please enter mailing address.'); f.address1.focus(); return false; }
if (f.city.value == "") { alert('Please enter city.'); f.city.focus(); return false; }
if (f.state.value == "") { alert('Please enter state.'); f.state.focus(); return false; }
if (f.zip.value == "") { alert('Please enter a valid zip code.'); f.zip.focus(); return false; }
if (f.zip.value.length < 5) {
         alert('Please enter at least 5 digits for zip code.');
         f.zip.focus();
         return false;
}
if (f.zip.value.match(regNum)) {
        alert('Please enter only numbers for zip code.');
        f.zip.focus();
        return false;
}
if (!f.email.value.match(/^\S+@\S+\.\S+$/)) {
   alert('Please enter a valid e-mail address.');
   f.email.select();
   f.email.focus();
   return false;
}
   
if (f.event_name.value == "") { alert('Please enter event name'); f.event_name.focus(); return false; }
if (f.event_day.value == "") { alert('Please enter event day'); f.event_day.focus(); return false; }
if (f.event_time.value == "") { alert('Please enter event time'); f.event_time.focus(); return false; }
if (f.event_loc.value == "") { alert('Please enter event location'); f.event_loc.focus(); return false; }
if (f.attendance.value == "") { alert('Please enter attendance'); f.attendance.focus(); return false; }
if (f.crewmember.value == "") { alert('Please select crew member'); f.crewmember.focus(); return false; }
if (f.description.value.length == 0) {alert('Please enter brief description'); f.description.focus(); return false;}



/* 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();
    		return false;
}
}
else {
    		alert('Please enter a valid month of birth.');
    		f.dob_month.focus();
    		return false;
}
   
/* 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();
     	return false;
}
  	 }
   	else {
     		alert('Please enter a valid day of birth.');
     		f.dob_day.focus();
    		 return false;
   	 }

  	// Validate year
   		if(!f.dob_year.value.match(/\d{4}/) || f.dob_year.value=="0000") {
   		alert('Please a valid year of birth (xxxx).');
   		f.dob_year.focus();
  		 return false;
   		}
   			
   	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='noservice.php';
	   return false;
   	   }

return true;
}