var activeMenuItem = new Array();

function isUlInArray(inputObj, ulObj){
    while (inputObj && inputObj.id != 'approfondimenti-menu') {
        if (inputObj == ulObj) 
            return true;
        inputObj = inputObj.parentNode;
    }
    return false;
}

function showHideSub(e, inputObj){

    if (!inputObj) 
        inputObj = this;
    var parentObj = inputObj.parentNode;
    var ul = parentObj.getElementsByTagName('UL')[0];
    if (activeMenuItem.length > 0) {
        for (var no = 0; no < activeMenuItem.length; no++) {
            if (!isUlInArray(ul, activeMenuItem[0]) && !isUlInArray(activeMenuItem[0], ul)) {
                activeMenuItem[no].style.display = 'none';
                activeMenuItem.splice(no, 1);
                no--;
            }
        }
    }
    if (ul.offsetHeight == 0) {
        ul.style.display = 'block';
        activeMenuItem.push(ul);
    }
    else {
        ul.style.display = 'none';
    }
}

function showHidePath(inputObj){
    var startTag = inputObj;
    showHideSub(false, inputObj);
    inputObj = inputObj.parentNode;
    while (inputObj) {
        inputObj = inputObj.parentNode;
        if (inputObj.tagName == 'LI') 
            showHideSub(false, inputObj.getElementsByTagName('A')[0]);
        if (inputObj.id == 'Menu') 
            inputObj = false;
    }
}

function initMenu(){
    var obj = document.getElementById('approfondimenti-menu');
    var linkCounter = 0;
    var aTags = obj.getElementsByTagName('A');
    var activeMenuItem = true;
    var activeMenuLink = true;
    var thisLocationArray = location.href.split(/\//);
    var fileNameThis = thisLocationArray[thisLocationArray.length - 1];
    if (fileNameThis.indexOf('?') > 0) 
        fileNameThis = fileNameThis.substr(0, fileNameThis.indexOf('?'));
    if (fileNameThis.indexOf('#') > 0) 
        fileNameThis = fileNameThis.substr(0, fileNameThis.indexOf('#'));
    
    for (var no = 0; no < aTags.length; no++) {
        var parent = aTags[no].parentNode;
        var subs = parent.getElementsByTagName('UL');
        if (subs.length > 0) {
            aTags[no].onclick = showHideSub;
            linkCounter++;
            aTags[no].id = 'aLink' + linkCounter;
        }
        
        if (aTags[no].href.indexOf(fileNameThis) >= 0 && aTags[no].href.charAt(aTags[no].href.length - 1) != '#') {
            if (aTags[no].parentNode.parentNode) {
                var parentObj = aTags[no].parentNode.parentNode.parentNode;
                var a = parentObj.getElementsByTagName('A')[0];
                if (a.id && !activeMenuLink) {
                
                    activeMenuLink = aTags[no];
                    activeMenuItem = a.id;
                }
            }
        }
    }
    
    if (activeMenuLink) {
        activeMenuLink.className = 'activeMenuLink';
    }
    if (activeMenuItem) {
        if (document.getElementById(activeMenuItem)) 
            showHidePath(document.getElementById(activeMenuItem));
    }
}

window.onload = initMenu;