var allAnswers = new Array();
var allSigns = new Array();

for (var i = 0; i < 18; i++) {
    allAnswers.push("a" + (i + 1));
    allSigns.push("s" + (i + 1));
}
function openCloseQuestion(signID, answerID) {
    if (document.getElementById) {
        for (var i = 0; i < allAnswers.length; i++) {
            if (allAnswers[i] == answerID) {
                if (document.getElementById(answerID).style.display == "block") {
                    document.getElementById(answerID).style.display = "none";
                    document.getElementById(signID).innerHTML = "&nbsp;+&nbsp;";
                }
                else {
                    document.getElementById(answerID).style.display = "block";
                    document.getElementById(signID).innerHTML = "&nbsp;-&nbsp;";
                }
            }
            else {
                document.getElementById(allAnswers[i]).style.display = "none";
                document.getElementById(allSigns[i]).innerHTML = "&nbsp;+&nbsp;";
            }
        }

    }
}

function expandAll() {
    for (var i = 0; i < allAnswers.length; i++) {
        document.getElementById(allAnswers[i]).style.display = "block";
        document.getElementById(allSigns[i]).innerHTML = "&nbsp;-&nbsp;";
    }
}

function collapseAll() {
    for (var i = 0; i < allAnswers.length; i++) {
        document.getElementById(allAnswers[i]).style.display = "none";
        document.getElementById(allSigns[i]).innerHTML = "&nbsp;+&nbsp;";
    }
}