function CheckForm() {  
if (document.getElementById('fName').value == "") {
	alert("You did not enter your first name.");
	}
else {
	CheckLastName();
	}
}
 
function CheckLastName() {  
if (document.getElementById('lName').value == "") {
	alert("You did not enter your last name.");
	}
else {
	CheckDept();
	}
}
 
function CheckDept() {  
if (document.getElementById('dept').value == "") {
	alert("You did not enter your department.");
	}
else {
	CheckEmail();
	}
}

function CheckEmail() {  
if (document.getElementById('email').value == "") {
	alert("You did not enter your email address.");
	}
else {
	CheckPhone();
	}
}

function CheckPhone() {  
if (document.getElementById('phone').value == "") {
	alert("You did not enter your phone number.");
	}
else {
	CheckUIN();
	}
}

function CheckUIN() {  
var getUIN = document.getElementById('uin').value;
var checkNum = getUIN.substring(3,0);
if (checkNum != "814") {
	alert("You must enter a valid UIN.");
	}
else {
	CheckDates();
	}
}
 
function CheckDates() {  
if (document.getElementById('classday').value == "") {
	alert("You did not pick a class to sign up for.");
	}
else {
	document.getElementById('signupform').submit();
	}
}