function toggleMenu(idMenu) {
    $("#" + idMenu + "CollapsableArea").slideToggle('slow');
    if (document.getElementById(idMenu + "ExpandCollapse").innerHTML == "+") {
        document.getElementById(idMenu + "ExpandCollapse").innerHTML = "-";
    }
    else {
        document.getElementById(idMenu + "ExpandCollapse").innerHTML = "+";
    }
}