function noenter() {
   return !(window.event && window.event.keyCode == 13);
}

function doPop(address, target, width, height) {
	var option = "width="+width+",outerWidth="+width+",height="+height+",outerHeight="+height+",top=60,left=60,address=no,toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=yes";
	objWindow = window.open(address, target, option); 
	objWindow.focus();
}

function validator(theForm) {
  if (!(theForm.accepter.checked)) {
    alert("U dient zich accoord te verklaren met de voorwaarden.");
    theForm.submit.focus();
    return (false);
  }
  return (true);
}