String.prototype.startsWith = function(str)
{ return (this.match("^" + str) == str) }

function openWin(url, w, h, scrollbars, resizable)
{
	var x = 0;
	var y = 0;

	//breedte en plaats bepalen
	if (  screen.width <=  w )
		//breedte past niet op scherm
		w =  screen.width - 100;
	else
		//breedte past wel
		x = ( screen.width - w ) / 2;
	
	//hoogte bepalen
	if (  screen.height <=  h )
		//breedte past niet op scherm
		h =  screen.height - 100;
	else
		//preview breedte past wel
		y = ( screen.height - h ) / 2;
	
	var opties = "width=" + w + ", height=" + h + ",scrollbars=" + scrollbars + ",resizable=| + resizable + |, left="+x+",top="+y+"";
	var popup = window.open(url , "popup", opties);
	popup.focus();
}

/* treeview functions */
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
        {
            checkUncheckSwitch = true;
        }
        else //checkbox unchecked
        {
            checkUncheckSwitch = false;
            var isAllSiblingsUnChecked = AreAllSiblingsCheckedUnchecked(srcChild,false);
            if (isAllSiblingsUnChecked)
                checkUncheckSwitch = false;
            else
                return; //do not need to check parent if any child is not checked
        }

        var inpElemsInParentTable = parentNodeTable.getElementsByTagName("input");
        if (inpElemsInParentTable.length > 0) {
            var parentNodeChkBox = inpElemsInParentTable[0];
            parentNodeChkBox.checked = checkUncheckSwitch;
            //do the same recursively
            CheckUncheckParents(parentNodeChkBox, checkUncheckSwitch);
        }
    }
}

function AreAllSiblingsCheckedUnchecked(chkBox,check) {
    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!=check) {
                    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;
}

/* end treeview functions */

var currExpandRowId = null;

function ExpandCollapseRow(RowId, Expand) {

    // collapse current row?
    if (Expand && currExpandRowId != null) {
        ExpandCollapseRow(currExpandRowId, false);

        if (currExpandRowId == RowId) {
            currExpandRowId = null;
            return;
        }
    }
    
    // expand row
    var elements = document.getElementsByTagName('*');
    
    for(var i=0;i<elements.length;i++)
    {
        var elm = elements[i];

        if (elm.id.startsWith(RowId + "@")) {
            elm.style.display = (Expand) ? '' : 'none';
            document.getElementById("imgExp" + RowId).src = "/images/" + ((Expand) ? "collapse.gif" : "expand.gif"); 
        }
    }

    currExpandRowId = RowId;

}

function paginaLoader(show) {

    document.getElementById('loadingDiv').style.display = show ? '' : 'none';

}