function openPDFWin(url) {
  window.open(url, '', 'resizable');
}
function openImgWin(width, height, url) {
  window.open(url, '', 'width=' + (width + 20) + ',height=' + (height + 28) + ',resizable');
}
function openBioPopup(url) {
  window.open(url, '', 'width=550,height=350,resizable,scrollbars');
}


/* Funktionen für das Online-Voting */
numSelectedVoteItems =  0;
MAX_VOTE_ITEMS       = 10;

function voteAlert(lang) {
  if (lang == 'de') {
    alert("Sie haben bereits " + MAX_VOTE_ITEMS + " Fragen ausgewählt!\n\nUm diese Frage auszuwählen müssen Sie zuerst eine andere, bereits gewählte Frage abwählen.");
  } else {
    alert("You've already selected " + MAX_VOTE_ITEMS + " questions!\n\nTo select this question please deselect any previously selected question first.");
  }
}

function clickVoteItem(item, lang) {
  if (!item.checked) {
    numSelectedVoteItems--;
    return true;
  }
  if (numSelectedVoteItems >= MAX_VOTE_ITEMS) {
    voteAlert(lang);
    return false;
  }
  numSelectedVoteItems++;
  return true;
}

function resetAllVoteItems() {
  for (i in document.forms[0].elements) {
    var el = document.forms[0].elements[i];
    if (el.checked) el.checked = false;
  }
}