var expireDate = new Date();
var year = expireDate.getYear(); 
year = (year < 1900) ? year + 1900 : year;
expireDate.setYear(year + 3);

function overAgeRequirement(age)
{

var eighteenDate = new Date();
var eighteenYear = eighteenDate.getFullYear()-18;
eighteenDate.setFullYear(eighteenYear);

if (age < eighteenDate) {return true;}
else {return false;}
};

function checkDate()
{
	var age = new Date();
	
	age.setMonth(document.subscribeForm.birthmonth[document.subscribeForm.birthmonth.selectedIndex].value-1);
	age.setDate(document.subscribeForm.birthday[document.subscribeForm.birthday.selectedIndex].value);
	age.setYear(document.subscribeForm.birthyear[document.subscribeForm.birthyear.selectedIndex].value);
	
	if ((document.subscribeForm.birthday[document.subscribeForm.birthday.selectedIndex].value != 0) && (document.subscribeForm.birthmonth[document.subscribeForm.birthmonth.selectedIndex].value !=0) && (document.subscribeForm.birthyear[document.subscribeForm.birthyear.selectedIndex].value != 0))
	{
		
		if (overAgeRequirement(age)) {
		
			return true;
		} else {
		
		 	return false;
		}
	}
	
};
/////////////////////////////////////////////
//  Checks for whitespace
///////////////////////////////////////////
function isWS(s) {
	return ((s == null) || (s.length == 0));
};

function validate() { 

		var errors = '';
		var finalerrors = 'The following fields are required:\n\n';
		var f = document.subscribeForm;
		
		if ((f.birthday[f.birthday.selectedIndex].value == 0) || (f.birthmonth[document.subscribeForm.birthmonth.selectedIndex].value ==0) || (f.birthyear[document.subscribeForm.birthyear.selectedIndex].value == 0)) {
			 errors += '    - Birthday\n';
	    } else {
			if(checkDate()){
				var sAge = f.birthmonth[f.birthmonth.selectedIndex].value;
				sAge += "/" + f.birthday[f.birthday.selectedIndex].value;
				sAge += "/" + f.birthyear[f.birthyear.selectedIndex].value;
		 		f.birthdate.value = sAge;
				
			} else {
			
				alert("Sorry, this registration is not intended for your age group.");
				 return false;
			}
		}
		
		if (isWS(f.name.value)) errors += '    - Name\n';
		
		if (isWS(f.email.value)) errors += '    - Email\n';
		
		if(f.newsletterCB.checked == true){
			f.newsletter.value = "Y";
		}else{
			f.newsletter.value = "N";
		}
		
		if(f.champsportsCB.checked == true){
			f.champsports.value = "Y";
		}else{
			f.champsports.value = "N";
		}
		
		if (errors != '') {
			finalerrors += errors;
			alert(finalerrors);
			return false;
		} else{
			return true;
		}
};