function openFeedbackForm(){
	hide('openFeedback');
	show('feedbackForm');
}
function closeFeedbackForm(){
	hide('feedbackForm');
	show('openFeedback');
}
function closeFeedbackNotification(){
	hide('feedbackNotification');
}
function checkFeedbackForm(){
	f = document.feedbackForm_form;
	if(f.Name.value == ''){
		alert('Please provide your name.');
	} else if(f.Comment.value == ''){
		alert('Please provide a comment.');
	} else {
		f.submit();
	}
}