/* Expand / Collapse Section support */

var collapsedSections = new Array();
var sectionsLoaded = false;

function toggleExpanded(img)
{
    // Firefox passes in the event object from the event handler, so
    //  we check for that and set to null
    if(img)
    {
        if(img.tagName == null)
        {
            e=img;
            img=null;
        }
    }

    // Find the expand & collapse image
    if(!img)
    {
        if (window.event)
            e = window.event;

        var img = sourceElement(e)    
        if(img)
        {
            while(img)
            {
                if(img.className == "expandcollapse" && img.tagName == "SPAN")
                    break;
                else
                    img = img.parentElement;
            }
            if(img)
                img = findExpandCollapseImage(img);
        }
    }


    if(img)
    {
        if(isSectionCollapsed(img.id) == true)
        {
            img.src = "images/hs-heading-expanded.gif";
            expandSection(img);
            removeCollapsedItem(img.id);
            if(img.id.indexOf("Family", 0) == 0)
            {
                protectedMembers = "on";
                configureMembersFilterCheckboxes();
                changeMembersFilterLabel();
            }
        }
        else
        {
            img.src = "images/hs-heading-collapsed.gif";
            collapseSection(img);
            addCollapsedSection(img.id);
        }

    saveSections();
    }
}

function findExpandCollapseImage(sourceElement)
{
    var e;
    var elements;

    if(sourceElement.tagName == "IMG" && sourceElement.className == "toggle")
    {
        return(sourceElement);
    }
    else
    {
        if(sourceElement)
        {
            elements = sourceElement.getElementsByTagName("IMG");

            for(var i=0;i<elements.length;i++)
            {
                e = elements[i];
                if(e.className == "toggle")
                {
                    return(e);
                }
            }
        }
    }
}

function toggleExpandedOnKey(e)
{
    if(window.event)
    {
        e = window.event;
    }

    if(e.keyCode == 13)
    {
        toggleExpanded(findExpandCollapseImage(e.srcElement));
    }
}

function expandSection(imageItem)
{
    if(imageItem.id != "toggleExpandedAllImage")
    {
        getNextSibling(imageItem.parentNode.parentNode).style.display = "";
    }
}

function collapseSection(imageItem)
{
    if(imageItem.id != "toggleExpandedAllImage")
    {
        getNextSibling(imageItem.parentNode.parentNode).style.display = "none";
    }
}

function isSectionCollapsed(imageId)
{
    for(var i=0; i < collapsedSections.length; ++i)
    {
        if(imageId == collapsedSections[i])
        {
            return true;
        }
    }

    return false;
}

function addCollapsedSection(imageId)
{
    if(isSectionCollapsed(imageId) == false)
    {
        collapsedSections[collapsedSections.length] = imageId;
    }
}

function removeCollapsedItem(imageId)
{
    for(var i=0; i < collapsedSections.length; ++i)
    {
        if(imageId == collapsedSections[i])
        {
            collapsedSections.splice(i, 1);
        }
    }
}

function saveSections()
{
    var x = 0;

    cleanUserDataStore();
    for(var i=0; i < collapsedSections.length; ++i)
    {
        if(shouldSave(collapsedSections[i]) == true)
        {
            save("imageValue" + x, collapsedSections[i]);
            x++;
        }
    }
}

function loadSections()
{
    var i = 0;
    var imageId = load("imageValue" + i);

    if(!sectionsLoaded)
    {
        while(imageId != null)
        {
            var imageItem = document.getElementById(imageId);

            if(imageItem != null)
            {
                if(imageItem.id.indexOf("Family", 0) == 0)
                {
                    if(protectedMembers == "on")
                    {
                        toggleExpanded(imageItem);
                    }
                }
                else
                {
                    toggleExpanded(imageItem);
                }
            }
            else
            {
                addCollapsedSection(imageId);
            }

            i++;
            imageId = load("imageValue" + i);
        }
        sectionsLoaded = true;
    }
/*        setCollapseAll();*/
}

function shouldSave(imageId)
{
    var toggleName;

    if(imageId == "toggleExpandedAllImage")
    {
        return false;
    }

    return true;
}

function openSectionById(id)
{
    var e=documentElement(id);

    if(e)
    {
        if(isSectionCollapsed(e.id) == true)
        {
            toggleExpanded(e);
        }
    }
}

function cleanUserDataStore()
{
    var i = 0;
    var imageId = load("imageValue" + i);

    while(imageId != null)
    {
        removeAttribute("imageValue" + i);
        i++;
        imageId = load("imageValue" + i);
    }
}