/*
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     AN OPENWAYBACK INSTANCE ON 6:40:34 Jul 10, 2024.
     JAVASCRIPT APPENDED BY OPENWAYBACK, COPYRIGHT INTERNET ARCHIVE.

     ALL OTHER CONTENT MAY ALSO BE PROTECTED BY COPYRIGHT (17 U.S.C.
     SECTION 108(a)(3)).
*/

var leafHandlerLoaded = void 0;
var rootHandlerLoaded = void 0;
$(document).ready(function(){
        /* SD 2012-03-13 The dropdowns had an onchange event
         *  that redirected the page to selected value. If you hit
         *  the browser back button the page went back to the original
         *  page, except for the dropdown that stayed the same. This
         *  was because the browser caches the form values; particularly IE.
         *  In order to avoid caching of the form elements we shall..
         *  1. remove the onchange attributes on the dropdown
         *  2. transfer the onchange to a JQuery onchange event
         *  3. When an onchange is triggered, capture the new selected value
         *  4. Revert the dropdowns to the original values, then
         *  5. redirect the page to the newly selected values.
         *  This is an ugly solution. It could have been put in the 
         *  meta tags in the original html files.
         */
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              *SD 2012-03-13 The following 5 lines may not be necessary, but they do make the html valid-html.
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    if(/\/hist\//.test(window.location.pathname)){
        /**
 * The Petroleum Navigator leaf page charting function
**/
var leafHandler = function($){
	return function(){
		// Is this the Natural Gas Navigator?
		var isNG, sourcekey, frequency, navigatorPrefix;
		
		//min must not be zero if negative values
		negativeValues = false;
		// An array of months for performing lookups
		var monthsArray = [
			'Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 
			'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'
		];
		// Returns the Chart Title and Units as an array
		var getTitleMatch = function(){
			//var titleRegex = /[^\(\)]+/g;
			var title = $('.Title1').html();
			//return title.match(titleRegex);  <- this didn't work as some series name have parenthical phrases
			var aTitle = [title.substring(0,title.lastIndexOf('(')-1), title.substring(title.lastIndexOf('(')+1,title.lastIndexOf(')')) ];
			return aTitle;
		}
		// Returns the table rows in a page for iteration
		var getTableRows = function(){
			if(isNG)
				return $('body > table:eq(2) tr');
			else
				return $('table.FloatTitle tr');
		}
		// Trims null values from the beginning and end of data
		// arrays
		var trimNulls = function(data){
			var i;
			var dataCopy = data.slice(0);
			
			for(i=data.length - 1; i>0; i--){
				if(data[i][1] === null) dataCopy.pop();
				else break;
			}
			for(i=0; i<data.length; i++){
				if(data[i][1] === null) dataCopy.shift();
				else break;
			}
			
			return dataCopy;
		}
		// Creates the options object for highcharts.  Any
		// Changes to the chart options should be implemented
		// Here
		var createOptions = function(parent, title, units, data){
			var ret;
		
			sourcekey = determineSourceKey().toUpperCase();
			frequency = determinePeriodType().toUpperCase();
			navigatorPrefix = isNG ? 'NG' : 'PET';
			
			var titleMatch = getTitleMatch();
			ret = {
				chart:{
					zoomType:'xy',
					renderTo:parent.id
				},
				title:{
					text:title
				},
				xAxis:{
					type:'datetime'
				},
				yAxis:{
					title:{
						text:units
					}
				},
				series:[{
					name: title,
					data: data
				}],
				legend:{
					enabled:true
				},
				exporting : {
					embedOptions : {
						series_id : navigatorPrefix + '.' + sourcekey + '.' + frequency
					}
				}/*,   This shows single points, but is too slow in IE for vary large series
				plotOptions:{
					line:{
						marker:{enabled: true, radius: 1}
					}
				}  */
			};
	
			switch(frequency){
				case 'd': // Daily
					ret.xAxis.maxZoom = 10 * 24 * 3600000;
					break;
				case 'w': // Weekly
				case '4': // 4-Week Avg
					ret.xAxis.maxZoom = 10 * 7 * 24 * 3600000;
					break;
				case 'm': // Monthly
					ret.xAxis.maxZoom = 10* 30 * 24 * 3600000;
					break;
				case 'a': // Annual
					ret.xAxis.maxZoom = 10 * 365 * 24 * 3600000;
					break;
			}
			if(negativeValues) ret.yAxis.min = null
			
			if(isReuters()){
				ret.chart.logo =2;
				ret.credits = {text: 'Data Source: Thomson Reuters', href: '', style: {color: '#FFFFFF'}};
			}
			else if(isBloomberg()){
				ret.chart.logo =3;
				ret.credits = {text: 'Source: Bloomberg', href: '', style: {color: '#000000'}};
			}
			if(navigator.userAgent.toLowerCase().indexOf('chrome') > -1)console.info(JSON.stringify(ret));
			return ret; 
		}
		//Indicates whether this is a Reutures series
		var isReuters = function(){
		  var tr_series = ['RWTC','RBRTE','EER_EPMRU_PF4_Y35NY_DPG','EER_EPMRU_PF4_RGC_DPG','EER_EPMRR_PF4_Y05LA_DPG','EER_EPD2F_PF4_Y35NY_DPG','EER_EPJK_PF4_RGC_DPG','EER_EPLLPA_PF4_Y44MB_DPG', 'RNGWHHD'];

		  for(var j=0;j<tr_series.length;j++){
			  if(sourcekey == tr_series[j]) return true;
		  }
		  
		  return false;
		}
		//Indicates whether this is a Reutures series
		var isBloomberg = function(){
		  var tr_series = ['NGM_EPG0_PLC_NUS_DMMBTU'];

		  for(var j=0;j<tr_series.length;j++){
			  if(sourcekey == tr_series[j]) return true;
		  }
		  
		  return false;
		}
		
		// Parses string values into floats
		var parseValue = function(string){
			var val, ret;
			val = parseFloat(string.replace(/,/g, ''));
			if(isNaN(val)){
				if(string == '')
					ret = void 0;
				else
					ret = null;
			}
			else ret = val;
			
			return ret;
		};
		// The processing function for processing daily data
		var processDailyData = function(){
			var data = [];
			var dateRegex = /(\d{4})\s+(\w{3})-(\s?\d{1,2})/ // (yyyy) (mmm)-(dd)
			
			getTableRows().each(function(i, n){
				var dateString = $(n).find('td.B6').html();
				if(dateString != void 0){
					var dateMatch = dateString.match(dateRegex);
					var currentDate = Date.UTC(
						dateMatch[1], // Year
						jQuery.inArray(dateMatch[2], monthsArray), // Month 
						dateMatch[3] // Day
					);
					$(n).find('td.B3').each(function(j, o){
						var val = parseValue($(o).html());
						if(val < 0) negativeValues = true;
						if(val !== void 0) data.push([currentDate, val]);
						currentDate = currentDate + 864E5; // Add a day
					});
				}
			});
			
			return data;
		}
		// The processing function for weekly data
		var processWeeklyData = function(){
			var data = [];
			var dateRegex1 = /(\d{4})-(\w{3})/; // yyyy-mmm
			var dateRegex2 = /\d{2}/g; // mm and dd
			
			getTableRows().each(function(i, n){
				var dateString1 = $(n).find('td.B6').html();
				if(dateString1 != void 0){
					var dateMatch1 = dateString1.match(dateRegex1);
					$(n).find('td.B5').each(function(j, o){
						var dateString2 = $(o).html();
						var dateMatch2 = dateString2.match(dateRegex2);
						if(dateMatch2 !== null){
							var currentDate = Date.UTC(
								dateMatch1[1], // Year
								jQuery.inArray(dateMatch1[2], monthsArray), // Month
								dateMatch2[1] // Day
							);
							var val = parseValue($(o).next('td.B3').html());
							if(val < 0) negativeValues = true;
							if(val !== void 0) data.push([currentDate, val]);
						}
					});
				}
			});
			return data;
		}
		// The processing function for monthly data
		var processMonthlyData = function(){
			var data = [];
			var dateRegex = /(\d{4})/; // yyyy
			
			getTableRows().each(function(i, n){
				var dateString = $(n).find('td.B4').html();
				if(dateString != void 0){
					var dateMatch = dateString.match(dateRegex);
					$(n).find('td.B3').each(function(j, o){
						var currentDate = Date.UTC(
							dateMatch[0], // Year
							j, // Column Index = Month Number
							1 // 1st
						);
						var val = parseValue($(o).html());
						if(val < 0) negativeValues = true;
						if(val !== void 0) data.push([currentDate, val]);
					});
				}
			});
			
			return data;
		}
		// The processing function for annual data
		var processAnnualData = function(){
			var data = [];
			var dateRegex = /(\d{4})/; // yyyy
			
			getTableRows().each(function(i, n){
				var dateString = $(n).find('td.B4').html();
				if(dateString != void 0){
					var dateMatch = dateString.match(dateRegex);
					var currentYear = dateMatch[0];
					$(n).find('td.B3').each(function(j, o){
						var currentDate = Date.UTC(
							currentYear, // Year
							0, // January
							1 // 1st
						);
						var val = parseValue($(o).html());
						if(val < 0) negativeValues = true;
						if(val !== void 0) data.push([currentDate, val]);
						currentYear++;
					});
				}
			});
			return data;
		}
		// Determines the period type
		var determinePeriodType = function(){
			if(isNG)
				var periodType = window.location.pathname.match(/([\w]{1})\.htm/)[1];
			else
				var periodType = window.location.search.match(/f=([\w\d]{1})/)[1];
			return periodType.toLowerCase();
		}
		
		var determineSourceKey = function() {
			var sourcekey;
			
			if(isNG) {
				sourcekey = window.location.pathname.match(/([\w-_]+)\w\.htm/)[1];
			} else {
				sourcekey = window.location.search.match(/s=([^&]+)/)[1];
			}
			
			return sourcekey;
		}
		// Determines the appropriate processing function based on
		// the frequency parameter in the URL search parameters
		var processData = function(periodType){
			var processor;
			var periodType = determinePeriodType();
	
			switch(periodType){
				case 'd': // Daily
					processor = processDailyData;
					break;
				case 'w': // Weekly
				case '4': // 4-Week Avg
					processor = processWeeklyData;
					break;
				case 'm': // Monthly
					processor = processMonthlyData;
					break;
				case 'a': // Annual
					processor = processAnnualData;
					break;
			}
			
			return trimNulls(processor.apply());
		};
		var prepareChartParent = function(){
			var imageParent = $('img[src*="hist_chart"]').parent().html(''),
			chartTable = imageParent.closest('table'),
			chartParent = $('<div id="highcharts_div"></div>').width('100%').appendTo(imageParent);
			// Make the chart 100% width
			chartTable.width('100%');
			// Hide the chart during processing
			chartParent.children().hide();
			return chartParent;
		}
		//This copies the referring pages div at the bottom of the page to the top of the page
		var copyReferringPages = function() {
			$('<div id="refer"></div>').html($('#refer').html()).insertAfter($('#contsub'));
			// remove first <BR> in body
			
			$('body > br').first().remove();
		}();
		
		// Add the source key and link to the api for this series
		var addSourceKeyIcon = function(chartParent) {
			var navigatorPrefix = isNG ? 'NG' : 'PET';
			
		$('<tr><td class="Footnotes"><a href="/opendata/qb.cfm?sdid=' + navigatorPrefix + '.' + determineSourceKey().toUpperCase() + '.' + determinePeriodType().toUpperCase() + '"><span class="ico_sourcekey" style="margin-bottom:-3px;"></span></a>This series is available through the EIA open data API and can be downloaded to Excel or embedded as an interactive chart or map on your website.</td></tr>')
			.insertAfter(chartParent.closest('tr'));
		}
		
		// This is the function that creates the chart object.
		// Executes immediately i.e.: function(args){/*do*/}(args);
		var createLeafChart = function(){
			isNG = window.location.pathname.match(/\/ng\//) !== null;
			
			var chartParent = prepareChartParent();
			var titleMatch = getTitleMatch();
			var data = processData();
			addSourceKeyIcon(chartParent);
			leafChart = new Highcharts.Chart(
				createOptions(
					chartParent.get(0),
					titleMatch[0],
					titleMatch[1],
					data
				)
			);
		}();
	}
}(jQuery); /**
* 	Created by Shivan Computers Corporation on behalf of the
* 	U.S. Energy Information Administration:
*	Author : Ryan Lynch (Ryan.Lynch@eia.gov)
*	
*	EIA Analyis Module:
*
*	This module extend the EIA Theme to add various analytical
*	functions to the chart, along with a set of controls to 
*	activate them.
*
*	Depends on: highcharts.js, eia-theme.js
**/

(function(){
	
	// Shortcuts
	var HC = Highcharts,
	Chart = HC.Chart;
	each = HC.each,
	extend = HC.extend,
	map = HC.map,
	eiaTheme = HC.eiaTheme,
	seasonalPalletAlpha = 0.3;
	
	// Default Analysis Options
	HC.setOptions(extend(eiaTheme, {
		analysis: {
			enableMovingAverage:true,
			enableSeasonalAnalysis:true
		}
	}));
	
	function seasonalPalletConverter(h){
		return 'rgba(' + 
			parseInt(h.substring(1,3), 16) + ',' +
			parseInt(h.substring(3,5), 16) + ',' + 
			parseInt(h.substring(5), 16) + ',' +
			seasonalPalletAlpha + ')';
	}
	
	// Colors for seasonal analysis
	extend(HC, {
		eia_seasonal_pallet : map(eiaTheme.colors.slice(1), seasonalPalletConverter)
	});
	
	//////////////////////////
	// Analytical Functions //
	//////////////////////////
	
	extend(Chart.prototype,{
	
		addMovingAverage : function(index, duration){
			var chart = this, baseSeries = chart.series[index],
			interval = baseSeries.options.xType, baseXData = baseSeries.xData,
			baseYData = baseSeries.yData, avgData = [], helperArray = [],
			dayInterval, durationTitle, avg = total = i = j = calcDuration = 0;
			// If we are dealing with a series that has been destroyed, then
			// return
			if(!baseXData) return;
			// else
			switch(interval){
				case HC.xTypes.Annual:
				case HC.xTypes.Quarterly:
				case HC.xTypes.Monthly:
					return;
					break;
				case HC.xTypes.weekly:
					durationTitle = duration + ' Week';
					dayInterval = 7 * 24 * 60 * 60 * 1000;
					break;
				case HC.xTypes.daily:
					durationTitle = duration + ' Day';
					dayInterval = 1 * 24 * 60 * 60 * 1000;
					break;
			}

			for(i = duration; helperArray.length == 0; i++){
				for(j = i - duration; j < i; j++){
					if(
						baseYData[j] != null && 
						baseXData[j] >= baseXData[i] - dayInterval * duration
					){
						total += baseYData[j];
						helperArray.push({
							x : baseXData[j],
							y : baseYData[j]
						});
					}
				}
			}
			
			avgData.push([baseXData[i], total/helperArray.length]);
			
			for(i = duration + 1; i < baseXData.length; i++){
				if(
					helperArray[0].x <= baseXData[i] - dayInterval * duration
				){
					total -= helperArray[0].y;
					helperArray.shift();
				}
				
				j = i - 1
				
				if(
					baseYData[j] != null && 
					baseXData[j] >= baseXData[i] - dayInterval * duration
				){
					total += baseYData[j];
					helperArray.push({
						x : baseXData[j],
						y : baseYData[j]
					});
				}
				
				avgData.push([baseXData[i], total / helperArray.length]);
			}
			//chart.legend.enabled = true;
			return chart.addSeries({
				//name : baseSeries.name + durationTitle + ' Moving Average',
				name : durationTitle + ' Moving Average',
				data : avgData
			});
		},
		
		createSeasonalAnalysis : function(index, interval){
			var chart = this, baseSeries = chart.series[index], yearOffset,  
			baseXData = baseSeries.xData, baseYData = baseSeries.yData,
			i = j = 0, series = [], seriesData, xType = baseSeries.options.xType,
			serie, startDate, currentDate, firstDate, originalStartDate, lastDate,
			dateString;
			
			if(!baseXData) return;
			j = baseXData.length - 1;
			startDate = originalStartDate = new Date(baseXData[j]);
			for(i = 0; i <= interval && j > 0; i++){
				endDate = new Date(
					startDate.getUTCFullYear() - 1, 
					startDate.getUTCMonth(), 
					startDate.getUTCDate()
				)
				seriesData = [];
				lastDate = new Date(baseXData[j]);
				while(
					j >= 0 && 
					(!currentDate || currentDate.getTime() >= endDate.getTime())
				){
					currentDate = new Date(baseXData[j]);
					seriesData.push({
						x: Date.UTC(
							currentDate.getUTCFullYear() + i,
							currentDate.getUTCMonth(),
							currentDate.getUTCDate()),
						tooltipX : currentDate.getTime(),
						y: baseYData[j]
					});
					firstDate = currentDate;
					j--;
				}
				j++;
				switch(xType){
					case HC.xTypes.daily:
						dateString = HC.dateFormat('%m/%d/%Y', firstDate.getTime()) + 
						' to ' + HC.dateFormat('%m/%d/%Y', lastDate.getTime());
						break;
					case HC.xTypes.weekly:
						dateString = HC.dateFormat('%m/%d/%Y', firstDate.getTime()) + 
						' to ' + HC.dateFormat('%m/%d/%Y', lastDate.getTime());
						break;
					case HC.xTypes.monthly:
						dateString = HC.dateFormat('%m/%Y', firstDate.getTime()) + ' to ' + 
						HC.dateFormat('%m/%Y', lastDate.getTime());
						break;
				}
				serie = {
					//name:baseSeries.options.name + ' ' + dateString,
					name: dateString,
					data:seriesData,
					legendIndex:i
				};
				if(i > 0) serie.color = HC.eia_seasonal_pallet[i-1];
				series.push(serie);
				startDate = endDate;
			}
			
			chart.removeAllSeries(false);
			
			for(j=series.length - 1; j>=0; j--){
				chart.addSeries(series[j], false);
			}
			
			chart.resetZoom();
			chart.redraw();
		}
	});
	
	function createSeasonalAnalysisOptions(s, index){
		var chart = this, xType = s.options.xType;
		if(s.type == 'line' && xType != HC.xTypes.category){
			var link, durations, maxInterval;
			if(xType > HC.xTypes.annual){
				maxInterval = (s.data[s.data.length - 1].x - s.data[0].x) / 31536E6 /*365 days*/;
				// Add moving averages
				each([5, 10], function(interval){
					if(interval < maxInterval){
						//option = $('<option></option>').html(s.name + ': ' + interval + ' Year Seasonal Analysis')
						option = $('<option></option>').html(interval + ' Year Seasonal Analysis')
						.data({
							method:chart.createSeasonalAnalysis,
							arguments:[index, interval]
						});
						option.appendTo(chart.options.chart.analysisSelect);
					}
				});
			}
		}
	}
	
	function createMovingAverageOptions(s, index){
		var chart = this, xType = s.options.xType;
		if(s.type == 'line' && xType != HC.xTypes.category){
			var link, durations,
			maxDuration = s.data.length;
			if(xType == HC.xTypes.daily){
				// Add moving averages
				each([30, 60, 90], function(duration){
					if(duration < maxDuration){
						//option = $('<option></option>').html(s.name + ': ' + duration + ' Day Moving Average ')
						option = $('<option></option>').html(duration + ' Day Moving Average ')
						.data({
							method:chart.addMovingAverage,
							arguments:[index, duration]
						});
						option.appendTo(chart.options.chart.analysisSelect);
					}
				});
			}
			if(xType == HC.xTypes.weekly){
				each([4, 8, 12], function(duration){
					if(duration < maxDuration){
						//option = $('<option></option>').html(s.name + ': ' + duration + ' Week Moving Average ')
						option = $('<option></option>').html(duration + ' Week Moving Average ')
						.data({
							method:chart.addMovingAverage,
							arguments:[index, duration]
						});
						option.appendTo(chart.options.chart.analysisSelect);
					}
				});
			}	
		}
	}
	
	function processAnalysis(){
		var chart = this, ops = chart.options,
		container = $(chart.options.chart.container),
		outerContainer = $(chart.options.chart.outerContainer);
		analysisContainer = $('<fieldset></fieldset>').css({
			height:'auto', 
			width:'auto', 
			// We set the margin and padding on the
			// captions container to match the chart
			// container so that the links are
			// lined up correctly
			marginLeft:container.css('marginLeft'),
			marginRight:container.css('marginRight')
			/*paddingLeft:container.css('paddingLeft'),
			paddingRight:container.css('paddingRight')*/
		}).addClass('chartAnalysisContainer').append('<legend>Chart Tools</legend>'),
		analysisSelect = $('<select><option>no analysis applied</option></select>'),
		analysisTable = $('<table></table>');
		
		// Enable or disable analysis based on maxXType
		switch(ops.maxXType){
			case HC.xTypes.annual:
				ops.analysis.enableMovingAverage &= false;
				ops.analysis.enableSeasonalAnalysis &= false;
				break;
			case HC.xTypes.monthly:
				ops.analysis.enableMovingAverage &= false;
				ops.analysis.enableSeasonalAnalysis &= true;
				break;
			case HC.xTypes.weekly:
				ops.analysis.enableMovingAverage &= true;
				ops.analysis.enableSeasonalAnalysis &= true;
				break;
			case HC.xTypes.daily:
				ops.analysis.enableMovingAverage &= true;
				ops.analysis.enableSeasonalAnalysis &= true;
				break;
			default:
				ops.analysis.enableMovingAverage &= false;
				ops.analysis.enableSeasonalAnalysis &= false;
				break;
		}
		
		if((
			ops.analysis.enableMovingAverage || 
			ops.analysis.enableSeasonalAnalysis
			) && !ops.chart.analysisContainer){
			analysisContainer.appendTo(outerContainer);
			analysisTable.append(
				$('<tr></tr>').append(
					$('<td></td>').append(analysisSelect)
				)
			).appendTo(analysisContainer);
			ops.chart.analysisContainer = analysisContainer[0];
			ops.chart.analysisSelect = analysisSelect[0];
			
			// Create Analytical function links
			resetButton = $('<button></button>').html('Reset').click(function(){
				chart.resetSeries(true);
			});
			applyButton = $('<button></button>').html('Apply').click(function(){
				var select = chart.options.chart.analysisSelect, 
				option = select.options[select.selectedIndex],
				optionData = $(option).data();
				chart.resetSeries(false);
				optionData.method.apply(chart, optionData.arguments);
			});
			if(
				ops.analysis.enableMovingAverage || 
				ops.analysis.enableSeasonalAnalysis
			){
				for(i in chart.series){
					s = chart.series[i];
					if(ops.analysis.enableMovingAverage) createMovingAverageOptions.call(chart, s, i);
					if(ops.analysis.enableSeasonalAnalysis) createSeasonalAnalysisOptions.call(chart, s, i);
				}
				if(analysisSelect.children().length > 0){
					analysisSelect.change(function(){
						if(analysisSelect.children(':selected').get(0).index ==0){
							chart.resetSeries(true);
						} else {
							var select = chart.options.chart.analysisSelect, 
							option = select.options[select.selectedIndex],
							optionData = $(option).data();
							chart.resetSeries(false);
							optionData.method.apply(chart, optionData.arguments);
						}
					});
					
					/*analysisTable.find('td')
						.append(applyButton)
						.append(resetButton);*/
					/*$('<tr></tr>').appendTo(analysisTable)
					.append(
						$('<td></td>')
						.append(applyButton)
						.append(resetButton)
					);*/
				}
				else
					analysisContainer.remove();
			}
		}
	}
	
	Chart.prototype.callbacks.push(processAnalysis);
}());
        leafHandlerLoaded = true;
        $(leafHandler);
    }
    else{
        var rootHandler = function($){
    var gbtn, cbtn, navigatorPrefix;
	
    function trimNulls(data){
        var i;
        var dataCopy = data.slice(0);
        
        for(i=data.length - 1; i>0; i--){
            if(data[i][1] === null) dataCopy.pop();
            else break;
        }
        for(i=0; i<data.length; i++){
            if(data[i][1] === null) dataCopy.shift();
            else break;
        }
        
        return dataCopy;
    }
    
    function addChartElements(){
        var cont = $('<div id="mce"></div')
            .css('display', 'none')
            .appendTo('body'),
        hccont = $('<div></div>')
            .attr('id', 'hc_container')
            .css({
                height : '600px',
                width : '800px',
                backgroundImage : 'url(/global/scripts/jQuery/tabs/loading.gif)',
                backgroundPosition : 'center',
                backgroundRepeat : 'no-repeat'
            })
            .appendTo(cont),
        link = $('<a></a>')
            .attr('href', '#hc_container')
            .attr('id', 'hc_link')
			.attr('title', 'Click and drag to zoom chart.  Use the buttons in upper right of chart for high quality print-outs and downloads.')
            .appendTo(cont)
            .fancybox({
				titlePosition : 'inside',
				titleFormat : function(title){
					return '<i>' + title + '</i>';
				},
                autoResize : false // To sidestep issue with Highcharts in Fancybox 2 disappearing when the browser is resized -SNW
			});
    };
    
    function addButtons(){
        // Clone the first th element and put the buttons in it
        var th = $('table.data1 > tbody > tr:eq(1) > th:eq(0)');
        th = th.clone().empty().insertAfter(th);
        gbtn = $('<button></button>').text('Graph').css('font-size', '90%').click(createChart).attr('disabled', true);
        cbtn = $('<button></button>').text('Clear').css('font-size', '90%').click(clearCheckboxes).attr('disabled', true);
        gbtn.appendTo(th);
        cbtn.appendTo(th);
    };
    function addCheckboxes(){
        var buttonsAdded = false,
        processRows = $('tr.DataRow td.DataHist a').length > 0;
        if(processRows){
            $('tr.DataRow').each(
                function(index, tr){
                    var cbtd,
                    cb,
                    td,
                    tokens,
                    a,
					href,
					apiKey;
					
					
                    // JQueryify the tr element
                    tr = $(tr);
                    // Get the second td
                    cbtd = tr.children(':eq(1)');
                    // Clone it
                    cbtd = cbtd.clone().insertBefore(cbtd)
                        .css('text-align', 'center');
                    // Find the history td
                    td = tr.find('td.DataHist');
                    if(td && (a = td.children('a')).length > 0){
                        if(!buttonsAdded){
                            addButtons();
                            buttonsAdded = true;
                        }
	
						// Get the sourcekey and frequency from the link
						// We use the html href instead of the jQuery attr('href')
						// to retrieve an absolute instead of relative link
						href = a.get(0).href;
						
						// Petroleum Navigator
						tokens = href.match(/s=(.*?)&f=(\w)/);
						navigatorPrefix = 'PET';
						
						// Natural Gas Navigator
						if(tokens === null) {
							tokens = href.match(/([^\/]*?)([WwMmDd4Aa]).(htm|html)/);
							navigatorPrefix = 'NG';
						}
						
                        // put the checkbox into the checkbox td
                        cbtd.empty();
						
						//increase width to accomodate api keys
						$(cbtd).attr('width', 84);
						var seriesId = navigatorPrefix + '.' + tokens[1].toUpperCase() + '.' + tokens[2].toUpperCase();
						apiKey = $('<a target="_blank" href="/opendata/qb.cfm?sdid=' + seriesId + '"><span class="ico_sourcekey" title="Click to view series in API browser"></span></a>')
							.appendTo(cbtd)
							.data({
								seriesId : seriesId
							});
							
                        cb = $('<input type="checkbox"></input>')
                            .addClass('chartCheckBox')
                            .appendTo(cbtd)
                            // Store the source key and frequency
                            .data({
                                srcKey : tokens[1].toUpperCase(),
                                freq : tokens[2].toUpperCase(),
                                link : href
                            });
                    }
                    
                }
            );
        }
    };
	
    function createChart(){
        var srcKeys = [],
        srcLinks = {},
        srcKey, freq;
        
        $('.chartCheckBox:checked').each(function(){
           var cb = $(this);
           srcKey = cb.data('srcKey')
           srcKeys.push(srcKey);
           srcLinks[srcKey] = cb.data('link')
           freq = cb.data('freq');
        });
        
        if(srcKeys.length > 0){
            $('#hc_container').empty();
            $('#hc_link').click();
            $.ajax({
                type:'POST',
                url: '/petroleum/get_series2.cfm',
                dataType: 'json',
                data: {
                    srcKeys : srcKeys.join(','),
                    freq : freq
                },
                success: function(result){
                    var keys = result.KEYS,
                    axis = result.AXIS,
                    baseAtZero = result.BASEATZERO,
                    axisOpts = [],
                    seriesOpts = [],
                    units = [],
                    seriesInfo;
                    
                    for(unit in axis){
                        units.push(unit);
                        axisOpts.push({
                            title : {
                                text : axis[unit]
                            },
                            min : baseAtZero ? 0 : null,
                            plotLines : [
                                Highcharts.eia_zero_axis_line
                            ],
                            opposite : axisOpts.length % 2
                        })
                    }
					var source_logo = Highcharts.logos.eia;
					var api_series_ids = [];
                    for(key in keys){
                        seriesInfo = keys[key];
			if(seriesInfo.SOURCE=="Thomson Reuters") source_logo = Highcharts.logos.reuters;
                        seriesOpts.push({
                            name : seriesInfo.NAME + (axisOpts.length > 1 ? ' (' + keys[key].UNITSABBREV + ')' : ''),
                            sourceKey : seriesInfo.KEY,
                            sourceLink : srcLinks[key],
                            data : trimNulls(Highcharts.map(seriesInfo.DATA, function(item, index){
                                var ds = String(item[0]),
                                val = Number(item[1]),
                                y = Number(ds.substring(0, 4)),
                                m = Number(ds.substring(4, 6)) - 1;
                                // Annual data has zero for the month
                                m = m >= 0 ? m : 0;
                                d = Number(ds.substring(6));
                                // Monthly / Annual data has a zero for the day
                                d = d != 0 ? d : 1;
                                
                                return[Date.UTC(y, m, d), !isNaN(val) ? val : null];
                            })),
                            yAxis : $.inArray(seriesInfo.UNITSABBREV.toUpperCase(), units)
                        });
						
						api_series_ids.push(navigatorPrefix + '.' + key + '.' + keys[key].FREQ);
                    }
					
                    chartOpts = {
                        chart : {
                            renderTo: 'hc_container',
                            lineUpYAxisZeros : true,
                            logo : seriesOpts.length > 1 ? Highcharts.logos.none : source_logo
                        },
                        title : {
                            text : $('.TopLabel2').text()
                        },
                        xAxis : {
                            type : 'datetime'
                        },
                        yAxis : axisOpts,
                        series : seriesOpts,
						exporting : {
							embedOptions : {
								series_id : api_series_ids.join(";")
							}
						}
                    }
                    
                    var chart = new Highcharts.Chart(chartOpts);
                }
            });
        }
    };
    
    function clearCheckboxes(){
        $('.chartCheckBox:checked').each(function(){
            $(this).attr('checked', false);
        });
		
		gbtn.attr('disabled', true);
		cbtn.attr('disabled', true);
    };
	
	function addFootnote() {
		var dataTable = $($('tr.DataRow').parents('table').get(0));
		var spacerTable = dataTable.next();
		// add the footnote table after the spacer table
		var footnoteTable = $('<table width="760" cellspacing="0" cellpadding="0"><tbody><tr><td class="Footnotes"><span class="ico_sourcekey selected" style="margin-bottom:-3px;"></span>Click on the source key icon to learn how to download series into Excel, or to embed a chart or map on your website.</td></tr></tbody></table>')
		.insertAfter(spacerTable);
		// add a second spacer table
		spacerTable.clone().insertAfter(footnoteTable);
	};
    
    return function(){
        addChartElements();
        addCheckboxes();
		addFootnote();
		
		$('input.chartCheckBox').on('change', function(event) {
			if($('input.chartCheckBox:checked').length > 0) {
				gbtn.attr('disabled', false);
				cbtn.attr('disabled', false);
			}
			else {
				gbtn.attr('disabled', true);
				cbtn.attr('disabled', true);
			}
		});
		
    
    };
}(jQuery);
        rootHandlerLoaded = true;
        $(rootHandler);
    }
	
	$.getScript('/global/survey/engine/js/survey_engine.js');
}());