formValidator = new Object();
formValidator.valid = true;
formValidator.messages = '';

formValidator.notEmpty = function(field) {
	if (document.getElementById(field).value === '')  {	
		formValidator.valid = false;
		formValidator.messages += "\n" + field_title(field) + ' is a required field.';
	}
}
formValidator.validEmail = function(field) {
	if (!document.getElementById(field).value.match(/^[a-z0-9._-]+\@([^.]+)\.([^.]+)$/)) {
		formValidator.valid =false;
		formValidator.messages += "\n" + field_title(field) + ' must be a valid email address.';
	}
}
formValidator.validZipcode = function(field) {
	if (!document.getElementById(field).value.match(/^\d{5}$/)) {
		formValidator.valid = false;
		formValidator.messages += "\n" + field_title(field) + ' must be a valid 5-digit US zipcode.';
	}
}


function field_title(field) {
	field = field.replace(/_/, ' ');
	return ucwords(field);
}
		
function ucwords(str) {
    return str.replace(/^(.)|\s(.)/g, function ( $1 ) { return $1.toUpperCase ( ); } );
}