// JScript File



// Value of obj is retrieved by the below code for IE and Firefox both browsers.
// Wherever there parentElement, it has been replaced by parentNode as parentElement does not work in firefox.

//************************** Treeview Parent-Child check behaviour ****************************//
function OnTreeClick(evt)
{
    var src = window.event != window.undefined ? window.event.srcElement : evt.target;
    var isChkBoxClick = (src.tagName.toLowerCase() == "input" && src.type == "checkbox");
    if(isChkBoxClick)
    {
        var parentTable = GetParentByTagName("table", src);
        var nxtSibling = parentTable.nextSibling;
        if(nxtSibling && nxtSibling.nodeType == 1)//check if nxt sibling is not null & is an element node
        {
            if(nxtSibling.tagName.toLowerCase() == "div") //if node has children
            {
            //check or uncheck children at all levels
            CheckUncheckChildren(parentTable.nextSibling, src.checked);
            }
        }
        //check or uncheck parents at all levels
        CheckUncheckParents(src, src.checked);
    }
}
function CheckUncheckChildren(childContainer, check)
{
    var childChkBoxes = childContainer.getElementsByTagName("input");
    var childChkBoxCount = childChkBoxes.length;
    for(var i = 0; i<childChkBoxCount; i++)
    {
        childChkBoxes[i].checked = check;
    }
}
function CheckUncheckParents(srcChild, check)
{
    var parentDiv = GetParentByTagName("div", srcChild);
    var parentNodeTable = parentDiv.previousSibling;

    if(parentNodeTable)
    {
        var checkUncheckSwitch;

        if(check) //checkbox checked
        {
            var isAllSiblingsChecked = AreAllSiblingsChecked(srcChild);
            if(isAllSiblingsChecked)
                checkUncheckSwitch = true;
            else
                return; //do not need to check parent if any(one or more) child not checked
        }
        else //checkbox unchecked
        {
            checkUncheckSwitch = false;
        }

        var inpElemsInParentTable = parentNodeTable.getElementsByTagName("input");
        if(inpElemsInParentTable.length > 0)
        {
            var parentNodeChkBox = inpElemsInParentTable[0];
            parentNodeChkBox.checked = checkUncheckSwitch;
            //do the same recursively
            CheckUncheckParents(parentNodeChkBox, checkUncheckSwitch);
        }
    }
}
function AreAllSiblingsChecked(chkBox)
{
    var parentDiv = GetParentByTagName("div", chkBox);
    var childCount = parentDiv.childNodes.length;
    for(var i=0; i<childCount;i++)
    {
        if(parentDiv.childNodes[i].nodeType == 1) //check if the child node is an element node
        {
            if(parentDiv.childNodes[i].tagName.toLowerCase() == "table")
            {
                var prevChkBox = parentDiv.childNodes[i].getElementsByTagName("input")[0];
                //if any of sibling nodes are not checked, return false
                if(!prevChkBox.checked)
                {
                    return false;
                }
            }
        }
    }
    return true;
}
//utility function to get the container of an element by tagname
function GetParentByTagName(parentTagName, childElementObj)
{
    var parent = childElementObj.parentNode;
    while(parent.tagName.toLowerCase() != parentTagName.toLowerCase())
    {
        parent = parent.parentNode;
    }
    return parent;
}

    // Validate TreeNodeChecked function to check if atleast one node in the TreeView control is selected.
    function ValidateTreeNodeChecked(obj)
    {
        var treeNodeFound = false;

        var node = obj.parentNode.getElementsByTagName("INPUT");
        var nodeCount = node.length;
        //alert(cnt);
        
        for(i=0; i < nodeCount; i++)
        {
            //alert(node[i].checked);
            if(node[i].checked == true)
            {
                treeNodeFound = true;
                break;
            }
        }

        //alert(treeNodeFound);
        return treeNodeFound;
    }
///////////////////////////////////////////////////////////////////////////////////////