//e-mail adres valideren (moet in juist formaat)
function validateEmail(content)
{
	return !(content.match(/^[A-Za-z0-9._\-]+\@[A-Za-z0-9._\-]+\.[A-Za-z]{2,4}$/) && content.indexOf(" ") == -1);
}

//Een string moet uit minimum $aantal characters bestaan
function checkLength(content, aantal)
{
	if (content == "")
	{
		return true;
	}	else	{
		if (content.length < aantal) 
		{
			return true;
		}	else	{
			return false;
		}
	}
}

function checkCommentForm()
{
	var foutvelden = "";
	var velden = ["name", "email"];
	var error = false;
	
	//Naam valideren
	if (checkLength(document.getElementById('name').value, 2)) {
		foutvelden += "\n - Name";
		error = true;
	};
	
	//Email valideren
	if (validateEmail(document.getElementById('email').value)) {
		foutvelden += "\n - E-mail";
		error = true;
	};
	
	//Comentaar valideren
	if (checkLength(document.getElementById('text').value, 2)) {
		foutvelden += "\n - Comment";
		error = true;
	};

	if (error) {
		alert("Please fill in the following fields: "+foutvelden);
		return false
	}	
}