function checkKey(evnt) {
	var keyCode;
	if (window.event){ 
		evnt = window.event;
		keyCode = evnt.keyCode;
	} else{
		keyCode = evnt.which;
	}
	if (keyCode == 13) {
		document.location.href = '/zoek/' + document.getElementById('zoek').value;
	}
}