function vernieuwen()
{
document.form.submit();	
}

function check(formulier) 
{
if (document.formulier.bericht.value=="")
	{
	document.formulier.melding.value = "U heeft nog geen bericht geschreven.";
	return false;
	}
}







function show()
{
if (document.getElementById("extra").style.visibility=='hidden')
	{
	document.getElementById("extra").style.visibility = 'visible';
	}
	else
	{
	document.getElementById("extra").style.visibility = 'hidden';
	}


}


function showOrHide(value)
{
  if (document.getElementById(value).style.display == 'none')
  {
    document.getElementById(value).style.display = 'block';
  }
  else
  {
    document.getElementById(value).style.display = 'none';
  }
}