function ShowHideDiv(DivID) {
    var divx = window.document.getElementById(DivID);
    if (divx.style.display == 'block')
        divx.style.display = 'none';
    else
        divx.style.display = 'block';
}

function HideDiv(DivID) {
    var divx = window.document.getElementById(DivID);
    divx.style.display = 'none';
}

function FocusDiv(DivID) {
    var divx = window.document.getElementById(DivID);
    divx.focus();
}

function ChangeMenuBackground(DivID) {
    if (DivID.style.backgroundColor == '') {
        DivID.style.backgroundColor = '#000000';
        DivID.style.color = '#ffffff';
    }
    else {
        DivID.style.backgroundColor = '';
        DivID.style.color = '#9e9e9e';
    }
}