function checkPostcode(postal_code)
{
	return postal_code.match(/^\d{4}\s?[A-Za-z]{2}$/);
}

function checkPhoneNumber(phone_number)
{
	return phone_number.match(/^\d{10}$/);
}

function checkEmail(email)
{
	return email.match(/^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/);
}

function checkStreetNumber(street_number)
{
	return street_number.match(/^\d{1,4}[A-Za-z]?$/);
}

function checkPhoneNumber(phone_number)
{
	return phone_number.match(/^\+?\d{2,}\-\?d{4,}$/);
}

function checkFilledIn(value)
{
	return value.match(/\w{2,}/);
}

function trim(value) 
{
	value = value.replace(/^\s+/,'');
	value = value.replace(/\s+$/,'');
	return value;
}