function validateFormOnSubmit(theForm) {
	var reason = "";

	reason += validateUsername(theForm.name);
	reason += validateEmail(theForm.email);
	reason += validatePhone(theForm.phone);
	//reason += validateSecurityAnswer(theForm.securityAnswer);
  
	if (reason != "") {
		alert("Some fields need correction:\n\n" + reason);
		return false;
	}
	
	return true;
}
		
function validateEmpty(fld) {
	var error = "";

	if (fld.value.length == 0) {
		fld.style.background = '#fff8cc'; 
		error = "The required field has not been filled in.\n"
	} else {
		fld.style.background = 'White';
	}
	return error;  
}
	
function validateUsername(fld) {
	var error = "";
	var illegalChars = /\W/; // allow letters, numbers, and underscores

	if (fld.value == "") {
		fld.style.background = '#fff8cc'; 
		error = "You didn't enter your name.\n";
	} else {
		fld.style.background = 'White';
	}
	return error;
}
	
function trim(s)
{
	return s.replace(/^\s+|\s+$/, '');
}
	
function validateEmail(fld) {
	var error="";
	var tfld = trim(fld.value);                        // value of field with whitespace trimmed off
	var emailFilter = /^[^@]+@[^@.]+\.[^@]*\w\w$/ ;
	var illegalChars= /[\(\)\<\>\,\;\:\\\"\[\]]/ ;

	if (fld.value == "") {
		fld.style.background = '#fff8cc';
		error = "You didn't enter an email address.\n";
	} else if (!emailFilter.test(tfld)) {              //test email for illegal characters
		fld.style.background = '#fff8cc';
		error = "Please enter a valid email address.\n";
	} else if (fld.value.match(illegalChars)) {
		fld.style.background = '#fff8cc';
		error = "The email address contains illegal characters.\n";
	} else {
		fld.style.background = 'White';
	}
	return error;
}
	
function validatePhone(fld) {
	var error = "";
	var stripped = fld.value.replace(/[\(\)\.\-\ ]/g, '');    

	if (fld.value == "") {
		error = "You didn't enter a phone number.\n";
		fld.style.background = '#fff8cc';
	} else if (isNaN(parseInt(stripped))) {
		error = "The phone number contains illegal characters.\n";
		fld.style.background = '#fff8cc';
	} else if (!(stripped.length == 10)) {
		error = "The phone number is the wrong length. Make sure you included an area code.\n";
		fld.style.background = '#fff8cc';
	}
	else
	{
		fld.style.background = 'White';	
	}
	
	return error;
}

function validateSecurityAnswer(fld)
{
	var error="";
	if (fld.value != "2")
	{
		error = "Security question is invalid."
		fld.style.background = '#fff8cc'; 
	}
	
	return error;
}