function toggle(sub){
    var i = 1;
    for (i = 1; i <= 6; i++) {
        document.getElementById('sub_' + i).style.display = 'none';
    };
    document.getElementById(sub).style.display = 'block';
};

window.onerror = null;
var bName = navigator.appName;
var bVer = parseInt(navigator.appVersion);
var IE4 = (bName == "Microsoft Internet Explorer" && bVer >= 4);
var menuActive = 0;
var menuOn = 0;
var onLayer;
var timeOn = null;

function showLayer(layerName, aa){
    var x = document.getElementById(aa);
    var tt = findPosX(x);
    var ww = findPosY(x) + 20;
    
    if (timeOn != null) {
        clearTimeout(timeOn);
        hideLayer(onLayer);
    }
    if (IE4) {
        var layers = eval('document.all["' + layerName + '"].style');
        layers.left = tt;
        eval('document.all["' + layerName + '"].style.visibility="visible"');
    }
    else {
        if (document.getElementById) {
            var elementRef = document.getElementById(layerName);
            if ((elementRef.style) && (elementRef.style.visibility != null)) {
                elementRef.style.visibility = 'visible';
                elementRef.style.left = tt;
                elementRef.style.top = ww;
            }
        }
    }
    onLayer = layerName
}

function hideLayer(layerName){
    if (menuActive == 0) {
        if (IE4) {
            eval('document.all["' + layerName + '"].style.visibility="hidden"');
        }
        else {
            if (document.getElementById) {
                var elementRef = document.getElementById(layerName);
                if ((elementRef.style) && (elementRef.style.visibility != null)) {
                    elementRef.style.visibility = 'hidden';
                }
            }
        }
    }
}

function btnTimer(){
    timeOn = setTimeout("btnOut()", 500)
}

function btnOut(layerName){
    if (menuActive == 0) {
        hideLayer(onLayer)
    }
}

var item;
function menuOver(itemName, ocolor){
    item = itemName;
    itemName.style.backgroundColor = ocolor; //background color change on mouse over
    clearTimeout(timeOn);
    menuActive = 1
}

function menuOut(itemName, ocolor){
    if (item) 
        itemName.style.backgroundColor = ocolor;
    menuActive = 0
    timeOn = setTimeout("hideLayer(onLayer)", 100)
}

function findPosX(obj){
    var curleft = 0;
    if (obj.offsetParent) {
        while (obj.offsetParent) {
            curleft += obj.offsetLeft
            obj = obj.offsetParent;
        }
    }
    else 
        if (obj.x) 
            curleft += obj.x;
    return curleft;
}

function findPosY(obj){
    var curtop = 0;
    if (obj.offsetParent) {
        while (obj.offsetParent) {
            curtop += obj.offsetTop
            obj = obj.offsetParent;
        }
    }
    else 
        if (obj.y) 
            curtop += obj.y;
    return curtop;
}