var collapseClass = "AspNet-TreeView-Collapse";
var expandClass = "AspNet-TreeView-Expand";
var showClass = "AspNet-TreeView-Show";
var hideClass = "AspNet-TreeView-Hide";

function IsExpanded__AspNetTreeView(element)
{
    return (HasClass__CssFriendlyAdapters(element, collapseClass));
}

function TogglePlusMinus__AspNetTreeView(element, showPlus)
{
    if (HasAnyClass__CssFriendlyAdapters(element))
    {
        var showPlusLocal = IsExpanded__AspNetTreeView(element);
        if ((typeof(showPlus) != "undefined") && (showPlus != null))
        {
            showPlusLocal = showPlus;
        }    
        var oldClass = showPlusLocal ? collapseClass : expandClass;
        var newClass = showPlusLocal ? expandClass : collapseClass;
        SwapClass__CssFriendlyAdapters(element, oldClass, newClass);
    }
}

function ToggleChildrenDisplay__AspNetTreeView(element, collapse)
{
//alert(element.parentNode);
//alert(element.parentNode);
    if ((element != null) && (element.parentNode != null) && (element.parentNode.getElementsByTagName != null))
    {   
     
        var childrenToHide = element.parentNode.getElementsByTagName("ul");
        
        //alert(childrenToHide);
        //alert(childrenToHide.length);
        
        var oldClass = collapse ? showClass : hideClass;
        var newClass = collapse ? hideClass : showClass;
    	for (var i=0; i<childrenToHide.length; i++)
    	{
    	    if ((childrenToHide[i].parentNode != null) && (childrenToHide[i].parentNode == element.parentNode))
    	    {
        	    SwapOrAddClass__CssFriendlyAdapters(childrenToHide[i], oldClass, newClass);
        	}
		}
	}
}

// Added to close all items for FAQ only
function getElementByClassFAQ(classname){ 
     var messages=new Array();
     var inc=0; 
     //var alltags=document.all? document.all : document.getElementsByTagName("*"); 
     var faq = document.getElementById('ctl00_cph_content_tvFAQs');
     var alltags=document.all? document.all : faq.getElementsByTagName("*");

     for (i=0; i<alltags.length; i++){
        if (alltags[i].className.match(classname)){ 
         messages[inc++]=alltags[i]; 
         }
     }
     if(messages != null){return messages;}
     else {return null;}
} 

// Added to close all items for FAQ only
function CollapseAllElements() {

    var faq = document.getElementById('ctl00_cph_content_tvFAQs');
    
    if (faq!=null) { 
        var root = getElementByClassFAQ('AspNet-TreeView-Root');

        for (i=0; i<root.length; i++){
            var allUL = root[i].getElementsByTagName('ul');
            var allSpan = root[i].getElementsByTagName('span')
            
            for (x=0; x<allUL.length; x++){
                    allUL[x].className = hideClass; 
                    allSpan[x].className = expandClass;            
                   }
         }
     }
}

function ExpandCollapse__AspNetTreeView(sourceElement)
{
    
    //alert(sourceElement);
    if (HasAnyClass__CssFriendlyAdapters(sourceElement))
    {
        var expanded = IsExpanded__AspNetTreeView(sourceElement);
        CollapseAllElements(); // Added to close all items before opening
        TogglePlusMinus__AspNetTreeView(sourceElement, expanded);
        ToggleChildrenDisplay__AspNetTreeView(sourceElement.parentNode, expanded);
    }
}

function GetViewState__AspNetTreeView(id)
{
    var retStr = "";
    if ((typeof(id) != "undefined") && (id != null) && (document.getElementById(id) != null))
    {
        var topUL = document.getElementById(id);
        retStr = ComposeViewState__AspNetTreeView(topUL, "");        
    }
    return retStr;
}

function ComposeViewState__AspNetTreeView(element, state)
{
    var child = element.firstChild;
    var bConsiderChildren = true;
              
    //  The following line must be changed if you alter the TreeView adapters generation of
    //  markup such that the first child within the LI no longer is the expand/collapse <span>.
    if ((element.tagName == "DIV") && (child != null))
    {
        var expandCollapseSPAN = null;
        var currentChild = child; 
                
        while (currentChild != null)
        {
            //alert(currentChild.className);
            if ((currentChild.tagName == "SPAN") && (currentChild.className != null) &&
                ((currentChild.className.indexOf(collapseClass) > -1) ||
                 (currentChild.className.indexOf(expandClass) > -1)))
            {
                //alert(currentChild);
                expandCollapseSPAN = currentChild;               
                break;
            }            
            currentChild = currentChild.nextSibling;
            
        }
            
        if (expandCollapseSPAN != null)
        {
            //alert('expandCollapseSPAN=' + expandCollapseSPAN.className);
            if (expandCollapseSPAN.className.indexOf(collapseClass) > -1)
            {
                //  If the "collapse" class is currently being used then the "collapse" icon is, presumably, being shown.
                //  In other words, the node itself is actually expanded at the present moment (which is why you now
                //  have the option of collapsing it.  So we mark it as an "expanded" node for purposes of the view state
                //  we are now accumulating.
                state +=  "e";
            }
            else if (expandCollapseSPAN.className.indexOf(expandClass) > -1)
            {
                //  This part of the tree is collapsed so we don't need to consider its children.
                bConsiderChildren = false;
                state +=  "n";
            }
        }
    }
        
    if (bConsiderChildren && (child != null))
    {
        state = ComposeViewState__AspNetTreeView(child, state);
    }
    
    if (element.nextSibling != null)
    {
        state = ComposeViewState__AspNetTreeView(element.nextSibling, state);
    }
    
    return state;
}