var seldiv = null;
var sela   = null;

function close_both() {
  opener.close();
  close();
}

function vraag(nr) {
  document.forms[0].nr.value = nr;
  document.forms[0].submit();
}

function click(item_nr, uitleg_nr) {
  if(document.forms[0])
    document.forms[0][item_nr].checked = !document.forms[0][item_nr].checked;
  show_onderscheid(item_nr, uitleg_nr);
}

function show_onderscheid(item_nr, uitleg_nr) {
  var div = document.getElementById("uitleg"+uitleg_nr);
  var a   = document.getElementById("a"+item_nr);
  
  if (seldiv) {
    seldiv.style.display = "none";
    sela.style.fontWeight = "normal";
  }
  if (div) {
    div.style.display = "block";
    a.style.fontWeight = "bold";
    seldiv = div;
    sela = a;
  }
  a.blur();
}

function popup_redenen(url) {
  if (document.all) {  // IE?
    var x = window.screenLeft + 58;
    var y = window.screenTop + 106;
  }
  else {  // Firefox
    var x = window.screenX + 58;
    var y = window.screenY + 106;
  }
  var w = window.open(url, "Redenen", "scrollbars=1, resizable=1, left="+x+", top="+y+", width=670, height=566, status=no");
  w.focus();
}