function closeFeedback()
{
	document.getElementById('feedbackDiv').style.display='none';
	document.getElementById('feedbackShadow').style.display='none';
	document.getElementById("feedbackName").value = "";
	document.getElementById("feedbackEmail").value = "";
	document.getElementById("feedbackMessage").value = "";
}

function validateFeedback()
{
	var valid = (document.getElementById("feedbackName").value
			&& document.getElementById("feedbackEmail").value
			&& document.getElementById("feedbackMessage").value
			&& validateEmail(document.getElementById("feedbackEmail").value));
	document.getElementById("feedbackSubmit").disabled = !valid;
	return valid;
}

function validateEmail(value)
{
	if (value.length=0 || !(/^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/.test(value)))
	{
		return false;
	}
	else
		return true;
}