function check_contact()
{
	if(document.contact.elements['Naam'].value=='')
	{
		document.contact.elements['Naam'].style.backgroundColor='#edf3fa';
		document.contact.elements['Naam'].focus();
	}
	else if(document.contact.elements['Emailadres'].value=='')
	{
		document.contact.elements['Emailadres'].style.backgroundColor='#edf3fa';
		document.contact.elements['Emailadres'].focus();
	}
	else if(document.contact.elements['Bericht'].value=='')
	{
		document.contact.elements['Bericht'].style.backgroundColor='#edf3fa';
		document.contact.elements['Bericht'].focus();
	}
	else
	{
		document.contact.action = 'default.asp';
		document.contact.elements['Verzenden'].disabled = true;
		document.contact.submit();
	}
}