(function($)
  {
    // This script was written by Steve Fenton
    // http://www.stevefenton.co.uk/Content/Jquery-Side-Content/
    // Feel free to use this jQuery Plugin
    // Version: 1.1.2
	
    $.fn.charts = function (settings) {
	
      var config = {
        classmodifier: "charts",
        charttype: "bars",
        direction: "horizontal",
        labelcolumn: 0,
        valuecolumn: 1,
        groupcolumn: -1,
        duration: 2000,
        showoriginal: false,
        chartbgcolours: ["#336699", "#669933", "#339966"],
        chartfgcolours: ["#FFFFFF", "#FFFFFF", "#FFFFFF"],
        chartpadding: 8,
        chartheight: 300,
        showlabels: true,
        showgrid: false,
        gridlines: 8,
        gridvalues: true
      };
		
      if (settings) {
        $.extend(config, settings);
      }
		
      var labelTimer;
		
      function RoundToTwoDecimalPlaces(number) {
        number = Math.round(number * 100);
        number = number / 100;
        return number;
      }
		
      function GetHorizontalBarsOutput(groupArray, labelArray, valueArray, totalValue, largestValue, labelTextArray) {
        var output = "";
        var colourIndex = 0;
			
        output += "<ul>";
			
        for (var i = 0; i < valueArray.length; i++) {
			
          if (colourIndex >= config.chartbgcolours.length) {
            colourIndex = 0;
          }
			
          var percent = 0;
          barWidth =0;
      
          if(totalValue>0 ) {
            var percent = Math.round((valueArray[i] / totalValue) * 100);
            var barWidth = Math.round((valueArray[i] / largestValue) * 100);  
          } 
      
				
				
          if (barWidth == 0) {
            barWidth = 4;
          
          } 
        
          var displayLabel = "";
          if (config.showlabels) {
            displayLabel = labelArray[i] + "<br>";
          }
				
          output += "<li>" + displayLabel + "<span class=\"" + config.classmodifier + "bar\" style=\"display: block; width: 0%; background-color: " + config.chartbgcolours[colourIndex] + "; color: " + config.chartfgcolours[colourIndex] + "; padding: " + config.chartpadding + "px 0; text-align: right;\" rel=\"" + barWidth + "\" title=\"" + labelTextArray[i] + " - " + valueArray[i] + " (" + percent + "%)" + "\">" + valueArray[i] + "&nbsp;</span></li>";
				
          colourIndex++;
        }
			
        output += "</ul>";
			
        return output;
      }
		
      function GetVerticalBarsOutput(groupArray, labelArray, valueArray, totalValue, largestValue, labelTextArray) {
        var output = "";
        var colourIndex = 0;
        var leftShim = 0;
        var shimAdjustment = RoundToTwoDecimalPlaces(100 / labelArray.length);
        var widthAdjustment = shimAdjustment - 1;
			
        var groupName = "";
        var useGroups = false;
        if (groupArray.length > 0) {
          useGroups = true;
        }
			
        output += "<div style=\"height: " + config.chartheight + "px; position: relative;\">";
			
        if (config.showgrid) {
               
          var gridLineCount = config.gridlines;
          var gridLineValue = (largestValue / gridLineCount);
          var gridLineHeight = (gridLineValue / largestValue) * 100;
                
          // All grid sections should be same height
          for (var i = 0; i < gridLineCount; i++) {
            var alternatingClass = "odd";
            if (i%2 == 0) {
              alternatingClass = "even";
            }
            output += "<div class=\"" + config.classmodifier + "gridline " + alternatingClass + "\" style=\"height: " + gridLineHeight + "%;\">";
            if (config.gridvalues) {
              var value = (gridLineCount - i) * gridLineValue;
              output += "<span style=\"display: inline-block; width: 3em; position: relative; left: -3em; border-top: 1px solid Gray;\">" + value + "</span>";
            }
            output += "</div>";
          }
        }
			
        for (var i = 0; i < valueArray.length; i++) {
			
          if (colourIndex >= config.chartbgcolours.length) {
            colourIndex = 0;
          }
			
          var percent = Math.round((valueArray[i] / totalValue) * 100);
          // Fix suggested by Jaime Casto
          if (isNaN(percent)) {
            percent = 0;
          }
				
          var barHeight = Math.round((valueArray[i] / largestValue) * 100);

          // Group headings
          if (useGroups) {
            if (groupArray[i] != groupName) {
              groupName = groupArray[i];
              colourIndex = 0;
              groupWidth = 0;
              for (var j = i; j < valueArray.length; j++) {
                if (groupArray[j] == groupName) {
                  groupWidth = groupWidth + (shimAdjustment -0.3);
                }
              }
              output += '<div class="' + config.classmodifier + 'group" style="text-align: center; z-index: 1000; position: absolute; bottom: -1.5em; left: ' + leftShim + '%; display: block; background-color: ' + config.chartbgcolours[colourIndex] + '; color: ' + config.chartfgcolours[colourIndex] + '; width: ' + groupWidth + '%;">' + groupName + '</div>';
            }
          }
				
          // Labels
          var displayLabel = "";
          if (config.showlabels) {
            displayLabel = "<span style=\"display: block; width: 100%; position: absolute; bottom: 0; text-align: center; background-color: " + config.chartbgcolours[colourIndex] + ";\">" + labelArray[i] + "</span>"
          }
				
          // Column
          output += "<div class=\"" + config.classmodifier + "bar\" style=\"position: absolute; bottom: 0; left: " + leftShim + "%; display: block; height: 0%; background-color: " + config.chartbgcolours[colourIndex] + "; color: " + config.chartfgcolours[colourIndex] + "; width: " + widthAdjustment + "%; text-align: center;\" rel=\"" + barHeight + "\" title=\"" + labelTextArray[i] + " - " + valueArray[i] + " (" + percent + "%)" + "\">" + valueArray[i] + displayLabel + "</div>"

          leftShim = leftShim + shimAdjustment;
				
          colourIndex++;
        }
			
        output += "</div>";
			
        return output;
      }
		
      function GetWaterfallOutput(labelArray, valueArray, totalValue, largestValue, labelTextArray) {
        var output = "";
        var colourIndex = 0;
        var leftShim = 0;
        var shimAdjustment = RoundToTwoDecimalPlaces(100 / labelArray.length);
        var widthAdjustment = shimAdjustment - 1;
			
        output += "<div style=\"height: " + config.chartheight + "px; position: relative;\">";
			
        var runningTotal = 0;
			
        for (var i = 0; i < valueArray.length; i++) {
				
          var positiveValue = valueArray[i];
          var isPositive = true;
          var colourIndex = 1;
				
          if (positiveValue < 0) {
            positiveValue = positiveValue * -1;
            isPositive = false;
            if (config.chartbgcolours.length > 2) {
              colourIndex = 2;
            }
          }
			
          var percent = RoundToTwoDecimalPlaces((positiveValue / totalValue) * 100);
          var barHeight = RoundToTwoDecimalPlaces((positiveValue / largestValue) * 100);
				
          var bottomPosition = runningTotal - barHeight; // Negative column
          if (i == 0 || i == (valueArray.length - 1)) {
            bottomPosition = 0; // first or last column
            colourIndex = 0;
          } else if (isPositive) {
            bottomPosition = runningTotal;
          }

          // Labels
          var displayLabel = "";
          if (config.showlabels) {
            displayLabel = "<span style=\"display: block; width: 100%; position: absolute; bottom: 0; text-align: center; background-color: " + config.chartbgcolours[colourIndex] + ";\">" + labelArray[i] + "</span>"
          }
				
          // Column
          output += "<div class=\"" + config.classmodifier + "bar\" style=\"position: absolute; bottom: " + bottomPosition + "%; left: " + leftShim + "%; display: block; height: 0%; background-color: " + config.chartbgcolours[colourIndex] + "; color: " + config.chartfgcolours[colourIndex] + "; width: " + widthAdjustment + "%; text-align: center;\" rel=\"" + barHeight + "\" title=\"" + labelTextArray[i] + " - " + valueArray[i] + " (" + percent + "%)" + "\">" + valueArray[i] + displayLabel + "</div>"

          leftShim = leftShim + shimAdjustment;
				
          if (isPositive) {
            runningTotal = runningTotal + barHeight;
          } else {
            runningTotal = runningTotal - barHeight;
          }
        }
			
        output += "</div>";
			
        return output;
      }
		
      return this.each(function () {
			
        // Validate settings
        if (config.chartbgcolours.length != config.chartfgcolours.length) {
          alert("Invalid settings, chartfgcolours must be same length as chartbgcolours");
        }
			
        var $table = $(this);
			
        // Caption
        var caption = $table.children("caption").text();
			
        // Headers
        var maxColumn = Math.max(config.valuecolumn, config.labelcolumn, config.groupcolumn);
        var headers = $table.find("thead th");
        if (headers.length <= maxColumn) {
          alert("Header count doesn't match settings");
        }
			
        // Values
        var values = $table.find("tbody tr");
			
        var labelArray = new Array();
        var labelTextArray = new Array();
        var valueArray = new Array();
        var groupArray = new Array();
			
        var totalValue = 0;
        var largestValue = 0;
        var currentGroup = "";
			
        // Creates a list of values and a total (and sets groups if required)
        for (var i = 0; i < values.length; i++) {
          if (config.groupcolumn > -1) {
            groupArray[groupArray.length] = $(values[i]).children("td").eq(config.groupcolumn).html();
          }
          var valueString = $(values[i]).children("td").eq(config.valuecolumn).text();
          if (valueString.length > 0) {
            var valueAmount = parseFloat(valueString, 10);
            labelArray[labelArray.length] = $(values[i]).children("td").eq(config.labelcolumn).html();
            labelTextArray[labelTextArray.length] = $(values[i]).children("td").eq(config.labelcolumn).text();
            valueArray[valueArray.length] = valueAmount;
            totalValue = totalValue + valueAmount;
            if (valueAmount > largestValue) {
              largestValue = valueAmount;
            }
          }
        }
			
        // Containing division
        var output = "<h3>" + caption + "</h3>" +
        "<div class=\"" + config.classmodifier + "container\">" +
        "<div class=\"" + config.classmodifier + "label\">&nbsp;</div>";
			
        // Get output based on chart type
        switch (config.charttype) {
			
          case 'bars':
				
            switch (config.direction) {
						
              case 'horizontal':
                // Horizontal Bars
                output += GetHorizontalBarsOutput(groupArray, labelArray, valueArray, totalValue, largestValue, labelTextArray);
                break;
							
              case 'vertical':
                // Vertical Bars
                output += GetVerticalBarsOutput(groupArray, labelArray, valueArray, totalValue, largestValue, labelTextArray);
                break;

            }
            break;
					
          case 'waterfall':
				
            switch (config.direction) {
					
              case 'horizontal':
                // Horizontal Bars
                alert("Horizontal waterfall charts not yet supported!");
                break;

              case 'vertical':
                // Waterfall chart
                output += GetWaterfallOutput(labelArray, valueArray, totalValue, largestValue, labelTextArray);
                break;
            }
            break;
			
        }
			
        // Close container
        output += "</div>";
			
        // Show the chart
        $table.after(output);
			
        if (!config.showoriginal) {
          $table.hide();
        }
			
        //$("." + config.classmodifier + "gridline").each( function () {
        //	$This = $(this);
        //	if ($This.hasClass("even")) {
        //		$This.css({ opacity: 0.5 });
        //	} else {
        //		$This.css({ opacity: 0.2 });
        //	}
        //});
			
        // Animation
        $("." + config.classmodifier + "bar").each( function() {
          var calculatedSize = $(this).attr("rel");
				
          switch (config.direction) {
            case "horizontal":
              $(this).animate({
                width: calculatedSize+"%"
              }, config.duration);
              break;
            case "vertical":
              $(this).animate({
                height: calculatedSize+"%"
              }, config.duration);
              break;
          }
        });
			
        // Labels
        $("." + config.classmodifier + "bar").mouseover( function() {
          window.clearTimeout(labelTimer);
          var $Label = $(this).parents("." + config.classmodifier + "container").find("." + config.classmodifier + "label");
          var $Bar = $(this);
          $Label.html("<div style=\"width: 70%; margin: 0 auto;\">" + $Bar.attr("title") + "</div>");
          $Label.find("div").css({
            "text-align": "center", 
            color: $Bar.css("background-color"), 
            "background-color": $Bar.css("color")
          });
          var labelHeight = $Label.find("div").height();
          $Label.css({
            height: labelHeight
          });
          return false;
        });
			
        $("." + config.classmodifier + "bar").mouseleave( function() {
          var $Bar = $(this);
          labelTimer = window.setTimeout(function () {
            $Bar.parents("." + config.classmodifier + "container").find("." + config.classmodifier + "label div").fadeOut("slow");
          }, 1000);
          return false;
        });
			
      });
		
      return this;
    };
  })(jQuery);