function toggleDisplay(divIdToShowHide, showHide) {
var divToShowHide = document.getElementById(divIdToShowHide);
if (showHide == "show")
    divToShowHide.style.display = "block";
else if (showHide == "hide")
    divToShowHide.style.display = "none";
else
    divToShowHide.style.display = (divToShowHide.style.display == "block") ? "none" : "block";
var buttonForDiv = document.getElementById(divIdToShowHide + 'Button');
if (divToShowHide.style.display == "block")
    buttonForDiv.innerHTML = "-";
else
    buttonForDiv.innerHTML = "+";
}