var activeMenuItem = new Array();

function isUlInArray(inputObj,ulObj){
    while(inputObj && inputObj.id!='listMenu'){
        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)){
                /*RGT don't collapse menu items that have already opened ?
                  activeMenuItem[no].style.display='none';
                */
                activeMenuItem.splice(no,1);
                no--;
            }
        }
    }

    if (null != ul)
    {
        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=='listMenu')inputObj=false;
    }
}

function initMenu()
{
    var obj = document.getElementById('listMenu');
    var linkCounter=0;
    var aTags = obj.getElementsByTagName('A');
    var activeMenuItem = false;
    var activeMenuLink = false;
    var thisLocationArray = location.href.split(/\//);
    var fileNameThis = thisLocationArray[thisLocationArray.length-1];

    // we want the params as for instance multiple menu options pointing to a viewDocument.page
    //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){
        if(null==activeMenuLink.className || activeMenuLink.className.length==0)
          activeMenuLink.className='activeMenuLink';
        else
         activeMenuLink.className='activeMenuLink ' + activeMenuLink.className;
    }
    if(activeMenuItem){
        if(document.getElementById(activeMenuItem))showHidePath(document.getElementById(activeMenuItem));
    }
}
window.onload = initMenu;