function validation() {
	var elems = document.forms['validation-form'].elements
	a = elems['name'].value;
	b = elems['email'].value;
	c = elems['subject'].value;
	d = elems['message'].value;
	if (a == '' || b == '' || c == '' || d == '') {
		alert('You must fill out all fields before submitting.');
		return false;
	}
	else {
		return true;
	}
}