var menuTopLeftTimeout = 500;
var menuTopLeftCloseTimer = 0;
var menuTopLeftItem = 0;

var menuTopLeftItemtt = 0;

// open hidden layer
function mopen(id) {
    // cancel close timer
    mcancelclosetime();

    // close old layer
    if (menuTopLeftItem) menuTopLeftItem.style.visibility = 'hidden';
    if (menuTopLeftItemtt) menuTopLeftItemtt.style.borderBottom = '0px';

    // get new layer and show it
    menuTopLeftItem = document.getElementById(id);
    menuTopLeftItem.style.visibility = 'visible';

    // change image
    menuTopLeftItemtt = document.getElementById(id + '_tt');
    menuTopLeftItemtt.style.borderBottom = '#666666 1px dotted';
}
// close showed layer
function mclose() {
    if (menuTopLeftItem) menuTopLeftItem.style.visibility = 'hidden';
    if (menuTopLeftItemtt) menuTopLeftItemtt.style.borderBottom = '0px';
}

// go close timer
function mclosetime() {
    menuTopLeftCloseTimer = window.setTimeout(mclose, menuTopLeftTimeout);
}

// cancel close timer
function mcancelclosetime() {
    if (menuTopLeftCloseTimer) {
        window.clearTimeout(menuTopLeftCloseTimer);
        menuTopLeftCloseTimer = null;
    }
}

// close layer when click-out
document.onclick = mclose;