//Variable that will store selected series
	var selSeries;			
			
	//Repository interaction end handler. Used to set availability of the 
	//Ungroup Series button depending on the selected series 
	metabase.EndRequest.add(PP.Delegate(function(){
		//Get selected workbook series
		selSeries = wbk.getActiveSheet().getSelectedSeries();
		//Set button availability
		if (selSeries.length == 1 && PP.TS.isGroupSerie(selSeries[0]))
		{
			ungroupSeriesButt.setEnabled(True);
		}
		else
		{
			ungroupSeriesButt.setEnabled(False);
		}			
		}));						
			
	var ungroupSeriesButt = new PP.Ui.Button({
		ParentNode: document.body, //DOM parent node
		Content: "Ungroup Series", //text
		Click: PP.Delegate(onClickUngroupSeries)
		});
				
	function onClickUngroupSeries()
	{	
		//Get and sort array of selected series
		var j;				
		var Series = selSeries.sort(tsService._sorting.bind(wbk));
		var realIndex = wbk.getRealIndex(undefined, Series[0]);
		var lastIndex = wbk.getRealIndex(undefined, Series[Series.length - 1]);
		//Get index of the last group series
		for (var i = 0; i < Series.length; i++)
		{
			lastIndex += wbk.getLoadedChildrenCount(Series[i]);
		}
		//Set properties of elements of series array
		for (j = 0; j < Series.length; j++)
		{
			Series[j].expanded = True;
			Series[j].atts = { its: { it: []} };
			delete Series[j].calc;
		}
				
		//Get a body of server request for editing workbook series
		var body = tsService.getEditSeriesSettings(wbk, Series);
		//Enter information about selected series to the body of request
		body.SetWbkMd.tArg.metaGet.seriesFilter = {
			range: {
					start: realIndex,
					count: lastIndex - realIndex + 1
					}
			};
		//Set whether workbook is changed
		wbk.setIsChanged(True);
		//Send request to server
		tsService._send(body, onUngroupSeries);
		//UnGroupSeries method execution end event handler
		function onUngroupSeries(sender, args){	
		//Get JSON object from server response
		var res = JSON.parse(args.ResponseText);
		var groupSeries = Series;
		//Get workbook series
		var wbkSeries = res.SetWbkMdResult.meta.series.its.it;
		var series = [];
		var k = 1;
		//Refresh a list of series
		wbk.updateSeriesList(wbkSeries);
		//Get the number of group series
		var count = wbk.getLoadedChildrenCount(wbkSeries[0]);
					
		//Create an object that contains information about group series
		for (var j = 0; j < groupSeries.length; j++)
		{
			for (var i = 0; i < wbkSeries.length; i++)
			{
				if (wbkSeries[i].parent && wbkSeries[i].parent.k == groupSeries[j].k)
				{
					wbkSeries[i].atts = { its: { it: []} };
					wbkSeries[i].index = Series[0].index + k;
					delete wbkSeries[i].calc;
					if (groupSeries[j].parent)
						wbkSeries[i].parent = groupSeries[j].parent;
					else
					{
						wbkSeries[i].parent = { k: -1, id: "" };
						for (var kk = 0; kk < groupSeries.length; kk++)
						{
							if (wbkSeries[i].k == groupSeries[kk].k)
							{
								groupSeries[kk].parent = undefined;
							}
						}
					}
					series.push(wbkSeries[i]);
					k++;
				}
			}
		}
		//Get a body of server request for changing series
		var body = tsService.getEditSeriesSettings(wbk, series);
		//Get index of the first group series
		var start = wbk.getRealIndex(undefined, wbkSeries[0]);
		//Set parent series for each group series
		if (wbkSeries[0].parent)
		{
			var parentSerie = wbk.getSerie(wbkSeries[0].parent.k);
			start = wbk.getRealIndex(undefined, parentSerie);
			count = wbk.getLoadedChildrenCount(parentSerie) + 1;
		}
		//Enter information about gorup to the body of request
		body.SetWbkMd.tArg.metaGet.seriesFilter = {
			range: {
					start: start,
					count: count
					}
			};
			//Set whether workbook is changed
			wbk.setIsChanged(True);			
			//Send request to server
			tsService._send(body, refresh);
			//remove the series that was a group
			tsService.removeSeries(wbk, groupSeries, refresh);
			}			
		}			
		function refresh()
		{
			//Refresh the entire component for displaying workbook
			workbookBox.refreshAll();
		}